diff --git a/index.js b/index.js
index 1b52ab83..d986487f 100644
--- a/index.js
+++ b/index.js
@@ -1,11 +1,12 @@
 "use strict";
 const fs = require("fs");
 const path = require("path");
+const Translation = require("./lib/translation");
 
 for(const pathname of fs.readdirSync(path.join(__dirname, "lib/lang"))) {
   const match = /^([^\.].*)\.js$/.exec(pathname);
 
   if(match) {
-    exports[match[1]] = require("./lib/lang/" + pathname);
+    exports[match[1]] = new Translation(Object.freeze(require("./lib/lang/" + pathname)));
   }
 }
diff --git a/lib/lang/ar.js b/lib/lang/ar.js
index 2069ff21..52f078fa 100644
--- a/lib/lang/ar.js
+++ b/lib/lang/ar.js
@@ -1,3 +1,4 @@
+"use strict";
 
 function join(a, b, joiner) {
 	return (a.slice(0, 4) === "يوم " && b.slice(0, 4) === "يوم " && joiner === " و ")
@@ -11,8 +12,8 @@ function strip_prefix(period) {
                                               period;
 }
 
-module.exports = require("../template")({
-	"clear": "صافِ",
+module.exports = {
+  "clear": "صافِ",
   "no-precipitation": "لا أمطار",
   "mixed-precipitation": "هطول أمطار وثلوج",
   "possible-very-light-precipitation": "إحتمالية هطول أمطار خفيفة",
@@ -122,11 +123,6 @@ module.exports = require("../template")({
   "temperatures-rising": "درجات حرارة ترتفع حتى $1 $2",
   "temperatures-valleying": "انخفاض درجات الحرارة لأدنى مستوى لها عند $1 $2",
   "temperatures-falling": "درجات حرارة تنخفض حتى $1 $2",
-  "title": function(str) {
-    return str;
-  },
-  "sentence": function(str) {
-    return str;
-  }
-  
-});
\ No newline at end of file
+  "title": "$1",
+  "sentence": "$1",
+};
diff --git a/lib/lang/az.js b/lib/lang/az.js
index 87192460..8c5f7173 100644
--- a/lib/lang/az.js
+++ b/lib/lang/az.js
@@ -1,6 +1,6 @@
 "use strict";
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "buludsuz",
   "no-precipitation": "yağmursuz",
   "mixed-precipitation": "qarışıq yağış",
@@ -119,4 +119,4 @@ module.exports = require("../template")({
 
     return str;
   },
-});
+};
diff --git a/lib/lang/be.js b/lib/lang/be.js
index e48fe2e1..2a4a7f27 100644
--- a/lib/lang/be.js
+++ b/lib/lang/be.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -14,87 +16,37 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-function time2(time)
-{
+function time2(time) {
   switch(time) {
-    case "раніцай":
-      time = "раніцы";
-      break;
-    case "днём":
-      time = "сярэдзіны дня";
-      break;
-    case "вечарам":
-      time = "вечара";
-      break;
-    case "ноччу":
-      time = "ночы";
-      break;
-    case "сёння ранкам":
-      time="сённяшняй раніцы";
-      break;
-    case "сёння позняй раніцай":
-      time="сённяшняй позняй раніцы";
-      break;
-    case "сёння днём":
-      time="сярэдзіны дня";
-      break;
-    case "сёння познім днём":
-      time="сённяшняга позняга дня";
-      break;
-    case "сёння ўвечары":
-      time="сённяшняга вечара";
-      break;
-    case "сёння познім вечарам":
-      time="сённяшняга позняга вечара";
-      break;
-    case "сёння ноччу":
-      time="сённяшняй ночы";
-      break;
-    case "сёння позняй ноччу":
-      time="сённяшняй позняй ночы";
-      break;
-    case "заўтра раніцай":
-      time="заўтрашняй раніцы";
-      break;
-    case "заўтра днём":
-      time="заўтрашняга дня";
-      break;
-    case "заўтра ўвечары":
-      time="заўтрашняга вечара";
-      break;
-    case "ўвечары":
-      time="вечара";
-      break;
-    case "заўтра ноччу":
-      time="заўтрашняй ночы";
-      break;
-    case "у нядзелю":
-      time="нядзелі";
-      break;
-    case "у панядзелак":
-      time="панядзелка";
-      break;
-    case "у аўторак":
-      time="аўторка";
-      break;
-    case "у сераду":
-      time="серады";
-      break;
-    case "у чацвер":
-      time="чацвярга";
-      break;
-    case "у пятніцу":
-      time="пятніцы";
-      break;
-    case "у суботу":
-      time="суботы";
-      break;
-  };
-
-  return time;
+    case "раніцай": return "раніцы";
+    case "днём": return "сярэдзіны дня";
+    case "вечарам": return "вечара";
+    case "ноччу": return "ночы";
+    case "сёння ранкам": return "сённяшняй раніцы";
+    case "сёння позняй раніцай": return "сённяшняй позняй раніцы";
+    case "сёння днём": return "сярэдзіны дня";
+    case "сёння познім днём": return "сённяшняга позняга дня";
+    case "сёння ўвечары": return "сённяшняга вечара";
+    case "сёння познім вечарам": return "сённяшняга позняга вечара";
+    case "сёння ноччу": return "сённяшняй ночы";
+    case "сёння позняй ноччу": return "сённяшняй позняй ночы";
+    case "заўтра раніцай": return "заўтрашняй раніцы";
+    case "заўтра днём": return "заўтрашняга дня";
+    case "заўтра ўвечары": return "заўтрашняга вечара";
+    case "ўвечары": return "вечара";
+    case "заўтра ноччу": return "заўтрашняй ночы";
+    case "у нядзелю": return "нядзелі";
+    case "у панядзелак": return "панядзелка";
+    case "у аўторак": return "аўторка";
+    case "у сераду": return "серады";
+    case "у чацвер": return "чацвярга";
+    case "у пятніцу": return "пятніцы";
+    case "у суботу": return "суботы";
+    default: return time;
+  }
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "ясна",
   "no-precipitation": "без ападкаў",
   "mixed-precipitation": "змешаныя ападкі",
@@ -236,5 +188,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/bg.js b/lib/lang/bg.js
index a3c55a1e..067e52b2 100644
--- a/lib/lang/bg.js
+++ b/lib/lang/bg.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -14,35 +16,20 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-function time2(time)
-{
+function time2(time) {
   switch(time) {
-    case "в неделя":
-      time = "неделя";
-      break;
-    case "в понеделник":
-      time = "понеделник";
-      break;
-    case "във вторник":
-      time = "вторник";
-      break;
-    case "в сряда":
-      time = "сряда";
-      break;
-    case "в четвъртък":
-      time = "четвъртък";
-      break;
-    case "в петък":
-      time = "петък";
-      break;
-    case "в събота":
-      time = "събота";
-      break;
-  };
-  return time;
+    case "в неделя": return "неделя";
+    case "в понеделник": return "понеделник";
+    case "във вторник": return "вторник";
+    case "в сряда": return "сряда";
+    case "в четвъртък": return "четвъртък";
+    case "в петък": return "петък";
+    case "в събота": return "събота";
+    default: return time;
+  }
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "ясно",
   "no-precipitation": "без превалявания",
   "mixed-precipitation": "временни превалявания",
@@ -180,5 +167,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/bs.js b/lib/lang/bs.js
index 19d82ec3..22c2791d 100644
--- a/lib/lang/bs.js
+++ b/lib/lang/bs.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -14,13 +16,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-function strip_prefix(period) {
-  return period.slice(0, 9) === "overnight" ? period.slice(4) :
-         period.slice(0, 7) ===   "in the " ? period.slice(7) :
-                                              period;
-}
-
-module.exports = require("../template")({
+module.exports = {
   "clear": "vedro",
   "no-precipitation": "nema padavina",
   "mixed-precipitation": "različite padavine",
@@ -115,16 +111,9 @@ module.exports = require("../template")({
   "stopping-then-starting-later": "$1 prekida za $2, ondak počinje za $3",
   "for-day": "$1 tokom cijelog dana",
   "starting": "$1 počinje $2",
-  "until": function(condition, period) {
-    return condition + " do " + strip_prefix(period);
-  },
-  "until-starting-again": function(condition, a, b) {
-    return condition + " do " + strip_prefix(a) + ", i opet poćinje " + b;
-  },
-  "starting-continuing-until": function(condition, a, b) {
-    return condition + " poćinje " + a + ", ostaje do " +
-           strip_prefix(b);
-  },
+  "until": "$1 do $2",
+  "until-starting-again": "$1 do $2, i opet poćinje $3",
+  "starting-continuing-until": "$1 poćinje $2, ostaje do $3",
   "during": "$1 $2",
   "for-week": "$1 tokom sedmice",
   "over-weekend": "$1 tokom vikenda",
@@ -137,12 +126,6 @@ module.exports = require("../template")({
    * rules, but it is adequate for the purposes of this module.) */
   "title": function(str) {
     return str.charAt(0).toUpperCase() + str.slice(1);
-    /*return str.replace(
-      /\b(?:a(?!nd\b)|[^\Wa])/g,
-      function(letter) {
-        return letter.toUpperCase();
-      }
-    );*/
   },
   /* Capitalize the first word of the sentence and end with a period. */
   "sentence": function(str) {
@@ -154,5 +137,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/ca.js b/lib/lang/ca.js
index 84972f97..2e599da5 100644
--- a/lib/lang/ca.js
+++ b/lib/lang/ca.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -14,13 +16,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-function strip_prefix(period) {
-  return period.slice(0, 9) === "durant la nit" ? period.slice(4) :
-         period.slice(0, 7) ===         "a la " ? period.slice(7) :
-                                                   period;
-}
-
-module.exports = require("../template")({
+module.exports = {
   "clear": "clar",
   "no-precipitation": "sense precipitacions",
   "mixed-precipitation": "precipitacions mixtes",
@@ -117,16 +113,9 @@ module.exports = require("../template")({
   "stopping-then-starting-later": "$1 parant d'aquí $2, tornant a començar al cap $3",
   "for-day": "$1 durant el dia",
   "starting": "$1 començant $2",
-  "until": function(condition, period) {
-    return condition + " " + strip_prefix(period);
-  },
-  "until-starting-again": function(condition, a, b) {
-    return condition + " " + strip_prefix(a) + ", començant " + b;
-  },
-  "starting-continuing-until": function(condition, a, b) {
-    return condition + " començant " + a + ", continuant " +
-           strip_prefix(b);
-  },
+  "until": "$1 $2",
+  "until-starting-again": "$1 $2, començant $3",
+  "starting-continuing-until": "$1 començant $2, continuant $3",
   "during": "$1 $2",
   "for-week": "$1 durant la setmana",
   "over-weekend": "$1 cap al cap de setmana",
@@ -152,5 +141,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/cs.js b/lib/lang/cs.js
index 085d07bb..889eb187 100644
--- a/lib/lang/cs.js
+++ b/lib/lang/cs.js
@@ -1,6 +1,4 @@
-function endsWith(str, suffix) {
-  return str.indexOf(suffix, str.length - suffix.length) !== -1;
-}
+"use strict";
 
 function remove_prefix_and_use_genitive(a) {
   switch(a) {
@@ -76,13 +74,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-function strip_prefix(period) {
-  return period.slice(0, 9) === "overnight" ? period.slice(4) :
-         period.slice(0, 7) ===   "in the " ? period.slice(7) :
-                                              period;
-}
-
-module.exports = require("../template")({
+module.exports = {
   "clear": "jasno",
   "no-precipitation": "bez srážek",
   "mixed-precipitation": "smíšené srážky",
@@ -186,30 +178,30 @@ module.exports = require("../template")({
   },
   "until-starting-again": function(condition, a, b) {
     var starting = "";
-    if(endsWith(condition, "srážky"))
+    if(condition.endsWith("srážky"))
       starting = ", které začnou znovu ";
-    else if(endsWith(condition, "déšť") || endsWith(condition, "déšť se sněhem") || endsWith(condition, "vítr"))
+    else if(condition.endsWith("déšť") || condition.endsWith("déšť se sněhem") || condition.endsWith("vítr"))
       starting = ", který začne znovu ";
-    else if(endsWith(condition, "sněžení") || endsWith(condition, "mrholení"))
+    else if(condition.endsWith("sněžení") || condition.endsWith("mrholení"))
       starting = ", které začne znovu ";
-    else if(endsWith(condition, "vlhkost"))
+    else if(condition.endsWith("vlhkost"))
       starting = ", která začne znovu ";
-    else if(endsWith(condition, "zamračeno") || endsWith(condition, "mlhavo"))
+    else if(condition.endsWith("zamračeno") || condition.endsWith("mlhavo"))
       starting = "a začne znovu ";
     
     return condition + " až do " + remove_prefix_and_use_genitive(a) + starting + b;
   },
   "starting-continuing-until": function(condition, a, b) {
     var continuing = "";
-    if(endsWith(condition, "srážky"))
+    if(condition.endsWith("srážky"))
       continuing = ", které přetrvají až do ";
-    else if(endsWith(condition, "déšť") || endsWith(condition, "déšť se sněhem") || endsWith(condition, "vítr"))
+    else if(condition.endsWith("déšť") || condition.endsWith("déšť se sněhem") || condition.endsWith("vítr"))
       continuing = ", který přetrvá až do ";
-    else if(endsWith(condition, "snežení") || endsWith(condition, "mrholení"))
+    else if(condition.endsWith("snežení") || condition.endsWith("mrholení"))
       continuing = ", které přetrvá až do ";
-    else if(endsWith(condition, "vlhkost"))
+    else if(condition.endsWith("vlhkost"))
       continuing = ", která přetrvá až do ";
-    else if(endsWith(condition, "zamračeno") || endsWith(condition, "mlhavo"))
+    else if(condition.endsWith("zamračeno") || condition.endsWith("mlhavo"))
       continuing = " a přetrvá až do ";
     return "od " + remove_prefix_and_use_genitive(a) + " " + condition + continuing + remove_prefix_and_use_genitive(b);
   },
@@ -234,5 +226,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/da.js b/lib/lang/da.js
index 34493034..bcac80ac 100644
--- a/lib/lang/da.js
+++ b/lib/lang/da.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -25,7 +27,7 @@ function grammar(str) {
             .replace(/(man|tirs|ons|tors|fre|lør|søn)(dag)/gi, "$1dagen");
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "klart",
   "no-precipitation": "ingen målbar nedbør",
   "mixed-precipitation": "blandet nedbør",
@@ -162,5 +164,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
\ No newline at end of file
+  },
+};
diff --git a/lib/lang/de.js b/lib/lang/de.js
index 64af7dff..63c7aa1f 100644
--- a/lib/lang/de.js
+++ b/lib/lang/de.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var i = 0;
 
@@ -18,7 +20,7 @@ function until_time(time) {
                             "bis " + time;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "heiter",
   "no-precipitation": "kein Niederschlag",
   "mixed-precipitation": "wechselnder Niederschlag",
@@ -180,5 +182,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/el.js b/lib/lang/el.js
index 43b6d495..37e8cb0d 100644
--- a/lib/lang/el.js
+++ b/lib/lang/el.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function singular_or_plural(n,singular,plural){
   return Math.abs(parseInt(n)) === 1 ? singular : plural;
 }
@@ -8,7 +10,7 @@ function strip_prefix(period) {
                                             period;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "αίθριος",
   "no-precipitation": "καθόλου υετός",
   "mixed-precipitation": "μικτός υετός",
@@ -146,5 +148,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/en.js b/lib/lang/en.js
index 09b61828..44d7fab7 100644
--- a/lib/lang/en.js
+++ b/lib/lang/en.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -25,7 +27,7 @@ function strip_prefix(period) {
                                               period;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "clear",
   "no-precipitation": "no precipitation",
   "mixed-precipitation": "mixed precipitation",
@@ -137,10 +139,10 @@ module.exports = require("../template")({
   "during": "$1 $2",
   "for-week": "$1 throughout the week",
   "over-weekend": "$1 over the weekend",
-  "temperatures-peaking": "temperatures peaking at $1 $2",
-  "temperatures-rising": "temperatures rising to $1 $2",
-  "temperatures-valleying": "temperatures bottoming out at $1 $2",
-  "temperatures-falling": "temperatures falling to $1 $2",
+  "temperatures-peaking": "high temperatures peaking at $1 $2",
+  "temperatures-rising": "high temperatures rising to $1 $2",
+  "temperatures-valleying": "high temperatures bottoming out at $1 $2",
+  "temperatures-falling": "high temperatures falling to $1 $2",
   /* Capitalize the first letter of every word, except if that word is
    * "and". (This is a very crude bastardization of proper English titling
    * rules, but it is adequate for the purposes of this module.) */
@@ -162,5 +164,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/es.js b/lib/lang/es.js
index f8b00268..83b5e6cb 100644
--- a/lib/lang/es.js
+++ b/lib/lang/es.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -14,13 +16,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-function strip_prefix(period) {
-  return period.slice(0, 9) === "sobre la noche" ? period.slice(4) :
-         period.slice(0, 7) ===         "en la " ? period.slice(7) :
-                                                   period;
-}
-
-module.exports = require("../template")({
+module.exports = {
   "clear": "despejado",
   "no-precipitation": "sin precipitaciones",
   "mixed-precipitation": "precipitación mixta",
@@ -117,16 +113,9 @@ module.exports = require("../template")({
   "stopping-then-starting-later": "$1 parando en $2, comenzando de nuevo $3 después",
   "for-day": "$1 durante el día",
   "starting": "$1 comenzando $2",
-  "until": function(condition, period) {
-    return condition + " hasta " + strip_prefix(period);
-  },
-  "until-starting-again": function(condition, a, b) {
-    return condition + " hasta " + strip_prefix(a) + ", comenzando otra vez " + b;
-  },
-  "starting-continuing-until": function(condition, a, b) {
-    return condition + " comenzando " + a + ", continuando hasta " +
-           strip_prefix(b);
-  },
+  "until": "$1 hasta $2",
+  "until-starting-again": "$1 hasta $2, comenzando otra vez $3",
+  "starting-continuing-until": "$1 comenzando $2, continuando hasta $3",
   "during": "$1 $2",
   "for-week": "$1 durante la semana",
   "over-weekend": "$1 sobre el fin de semana",
@@ -152,5 +141,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/et.js b/lib/lang/et.js
index 0165fca5..07958302 100644
--- a/lib/lang/et.js
+++ b/lib/lang/et.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -52,7 +54,7 @@ function illative(word){
   return grammar.hasOwnProperty(word)? grammar[word][1]: word;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "selge",
   "no-precipitation": "kuiv",
   "mixed-precipitation": "erinevad sademed",
@@ -180,5 +182,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/fi.js b/lib/lang/fi.js
index f2b34fd6..d3dc2bf5 100644
--- a/lib/lang/fi.js
+++ b/lib/lang/fi.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -45,7 +47,7 @@ function illative(word){
   return grammar.hasOwnProperty(word)? grammar[word][1]: word;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "selkeää",
   "no-precipitation": "poutaa",
   "mixed-precipitation": "räntäsadetta",
@@ -171,5 +173,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/fr.js b/lib/lang/fr.js
index c15cadc4..3627ddc0 100644
--- a/lib/lang/fr.js
+++ b/lib/lang/fr.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var i = 0,
       j;
@@ -13,7 +15,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a.slice(0, i) + a.slice(i) + joiner + b.slice(i);
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "dégagé",
   "no-precipitation": "pas de précipitations",
   "mixed-precipitation": "précipitations mêlées",
@@ -125,10 +127,10 @@ module.exports = require("../template")({
   "during": "$1 $2",
   "for-week": "$1 pendant toute la semaine",
   "over-weekend": "$1 pendant tout le week-end",
-  "temperatures-peaking": "des températures atteignant $1 $2",
-  "temperatures-rising": "des températures montant jusqu’à $1 $2",
-  "temperatures-valleying": "des températures atteignant $1 $2",
-  "temperatures-falling": "des températures descendant jusqu’à $1 $2",
+  "temperatures-peaking": "des températures maximales atteignant $1 $2",
+  "temperatures-rising": "des températures maximales montant jusqu’à $1 $2",
+  "temperatures-valleying": "des températures maximales atteignant $1 $2",
+  "temperatures-falling": "des températures maximales descendant jusqu’à $1 $2",
   /* Capitalize the first letter of every word, except if that word is "et".
    *
    * Fun fact: JavaScript regex's "\w" and "\b" don't recognize accented
@@ -152,5 +154,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/hr.js b/lib/lang/hr.js
index 1d034f1d..f93214d5 100644
--- a/lib/lang/hr.js
+++ b/lib/lang/hr.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -14,13 +16,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-function strip_prefix(period) {
-  return period.slice(0, 9) === "overnight" ? period.slice(4) :
-         period.slice(0, 7) ===   "in the " ? period.slice(7) :
-                                              period;
-}
-
-module.exports = require("../template")({
+module.exports = {
   "clear": "vedro",
   "no-precipitation": "nema padalina",
   "mixed-precipitation": "različite padaline",
@@ -117,16 +113,9 @@ module.exports = require("../template")({
   "stopping-then-starting-later": "$1 prestaje za $2, pa počinje za $3",
   "for-day": "$1 tijekom cijelog dana",
   "starting": "$1 počinje $2",
-  "until": function(condition, period) {
-    return condition + " do " + strip_prefix(period);
-  },
-  "until-starting-again": function(condition, a, b) {
-    return condition + " do " + strip_prefix(a) + ", i opet počinje " + b;
-  },
-  "starting-continuing-until": function(condition, a, b) {
-    return condition + " počinje " + a + ", ostaje do " +
-           strip_prefix(b);
-  },
+  "until": "$1 do $2",
+  "until-starting-again": "$1 do $2, i opet počinje $3",
+  "starting-continuing-until": "$1 počinje $2, ostaje do $3",
   "during": "$1 $2",
   "for-week": "$1 tijekom tjedna",
   "over-weekend": "$1 tijekom vikenda",
@@ -156,5 +145,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/hu.js b/lib/lang/hu.js
index f4aad0b2..c3012310 100644
--- a/lib/lang/hu.js
+++ b/lib/lang/hu.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -19,13 +21,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + " és " + b.slice(i)+ joiner;
 }
 
-function strip_prefix(period) {
-  return period.slice(0, 9) === "éjszaka" ? period.slice(4) :
-         period.slice(0, 7) ===   "" ? period.slice(7) :
-                                              period;
-}
-
-module.exports = require("../template")({
+module.exports = {
   "clear": "derült",
   "no-precipitation": "csapadékmentes idő",
   "mixed-precipitation": "vegyes csapadék",
@@ -122,15 +118,9 @@ module.exports = require("../template")({
   "stopping-then-starting-later": "$1 $2 múlva véget ér, de $3 elteltével újra várható",
   "for-day": "$1 egész nap",
   "starting": "$1 lesz $2",
-  "until": function(condition, period) {
-    return condition + " " + strip_prefix(period)+ "";
-  },
-  "until-starting-again": function(condition, a, b) {
-    return condition + " " + strip_prefix(a) + ", majd "+ b +" ismét" ;
-  },
-  "starting-continuing-until": function(condition, a, b) {
-    return condition + " kezdődik " + a + ", " + strip_prefix(b) + " folytatódik";
-  },
+  "until": "$1 $2",
+  "until-starting-again": "$1 $2, majd $3 ismét",
+  "starting-continuing-until": "$1 kezdődik $2, $3 folytatódik",
   "during": "$1 $2",
   "for-week": "$1 ezen a héten",
   "over-weekend": "$1 a hétvégén",
@@ -152,5 +142,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/id.js b/lib/lang/id.js
index 727420cf..9b3bb390 100644
--- a/lib/lang/id.js
+++ b/lib/lang/id.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -14,7 +16,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "cerah",
   "no-precipitation": "tidak hujan",
   "mixed-precipitation": "hujan ringan",
@@ -144,5 +146,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/is.js b/lib/lang/is.js
index e9e8189f..419d9ea5 100644
--- a/lib/lang/is.js
+++ b/lib/lang/is.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -20,7 +22,7 @@ function strip_prefix(period) {
                                               period;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "heiðskýrt",
   "no-precipitation": "engin úrkoma",
   "mixed-precipitation": "úrkoma með köflum",
@@ -148,5 +150,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/it.js b/lib/lang/it.js
index 30d2d488..ecc32474 100644
--- a/lib/lang/it.js
+++ b/lib/lang/it.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -17,12 +19,12 @@ function join_with_shared_prefix(a, b, joiner) {
 function strip_prefix(period) {
   if(period === "in serata") return "sera";
   if(period === "in mattinata") return "mattina";
-  if(period.slice(0,6) === "nella ") return period.slice(6);
-  if(period.slice(0,4) === "nel ") return period.slice(4);
+  if(period.slice(0, 6) === "nella ") return period.slice(6);
+  if(period.slice(0, 4) === "nel ") return period.slice(4);
   return period;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "sereno",
   "no-precipitation": "nessuna precipitazione",
   "mixed-precipitation": "precipitazioni miste",
@@ -161,5 +163,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/ja.js b/lib/lang/ja.js
index f63b4163..a13335ff 100644
--- a/lib/lang/ja.js
+++ b/lib/lang/ja.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var i = 0;
 
@@ -12,7 +14,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a.slice(0, i) + a.slice(i) + joiner + b.slice(i);
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "晴れ",
   "no-precipitation": "降水なし",
   "mixed-precipitation": "みぞれ",
@@ -109,15 +111,9 @@ module.exports = require("../template")({
   "stopping-then-starting-later": "$1が$2に終わり、また$3後始まります",
   "for-day": "一日中$1",
   "starting": "$1は$2が始まります",
-  "until": function(condition, period) {
-    return  condition + period + " まで" ;
-  },
-  "until-starting-again": function(condition, a, b) {
-    return condition + a + "まで" + b +  ", また始まる " ;
-  },
-  "starting-continuing-until": function(condition, a, b) {
-    return condition + a + " 始まって" + b + ", まで続く " ;
-  },
+  "until": "$1$2 まで",
+  "until-starting-again": "$1$2まで$3, また始まる ",
+  "starting-continuing-until": "$1$2 始まって$3, まで続く ",
   "during": "$1から$2にかけて",
   "for-week": "一週間中$1",
   "over-weekend": "土、日曜日に$1",
@@ -132,5 +128,5 @@ module.exports = require("../template")({
       str += "。";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/ka.js b/lib/lang/ka.js
index 0d21323d..b7afd447 100644
--- a/lib/lang/ka.js
+++ b/lib/lang/ka.js
@@ -1,4 +1,6 @@
-module.exports = require("../template")({
+"use strict";
+
+module.exports = {
   "clear": "მოწმენდილი",
   "no-precipitation": "უნალექო",
   "mixed-precipitation": "ცვალებადი ნალექი",
@@ -105,5 +107,5 @@ module.exports = require("../template")({
       str += ".";
     }
     return str; 
-  }
-});
+  },
+};
diff --git a/lib/lang/kw.js b/lib/lang/kw.js
index 3ee77852..c89640ad 100644
--- a/lib/lang/kw.js
+++ b/lib/lang/kw.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function in_the(period) {
   var f=period.charAt(0);
   var n="123456789";
@@ -20,7 +22,7 @@ function until_the(period) {
     return " bys yn " + period;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "kler",
   "no-precipitation": "kodhans vyth",
   "mixed-precipitation": "kodhans kemyskys",
@@ -169,5 +171,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/nl.js b/lib/lang/nl.js
index 54e14e8f..380aa55b 100644
--- a/lib/lang/nl.js
+++ b/lib/lang/nl.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var i = 0;
 
@@ -20,7 +22,7 @@ function weekdays(scope, day){
   return (scope.indexOf("through") !== -1 ? "" : "op ") + day;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "helder",
   "no-precipitation": "geen neerslag",
   "mixed-precipitation": "wisselende neerslag",
@@ -169,5 +171,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/nb.js b/lib/lang/no.js
similarity index 99%
rename from lib/lang/nb.js
rename to lib/lang/no.js
index c8ac6012..4b813d36 100644
--- a/lib/lang/nb.js
+++ b/lib/lang/no.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -20,7 +22,7 @@ function strip_prefix(period) {
                                                  period;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "klart",
   "no-precipitation": "ingen målbar nedbør",
   "mixed-precipitation": "blandet nedbør",
@@ -149,5 +151,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/pl.js b/lib/lang/pl.js
index 589a1863..51d2cb0a 100644
--- a/lib/lang/pl.js
+++ b/lib/lang/pl.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       n = b,
@@ -55,7 +57,7 @@ function genitive_form(a) {
   } 
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "bezchmurnie",
   "no-precipitation": "brak opadów",
   "mixed-precipitation": "przelotne opady",
@@ -190,5 +192,5 @@ module.exports = require("../template")({
     if (str.charAt(str.length - 1) !== ".")
       str += ".";
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/pt.js b/lib/lang/pt.js
index a6b8c517..9ee8f367 100644
--- a/lib/lang/pt.js
+++ b/lib/lang/pt.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -14,7 +16,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "limpo",
   "no-precipitation": "sem aguaceiros",
   "mixed-precipitation": "aguaceiros variados",
@@ -139,5 +141,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/ro.js b/lib/lang/ro.js
index 2e76721b..f80db4e0 100644
--- a/lib/lang/ro.js
+++ b/lib/lang/ro.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var i = 0,
       j;
@@ -13,13 +15,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a.slice(0, i) + a.slice(i) + joiner + b.slice(i);
 }
 
-function strip_prefix(period) {
-  return period.slice(0, 9) === "overnight" ? period.slice(4) :
-         period.slice(0, 7) ===   "in the " ? period.slice(7) :
-                                              period;
-}
-
-module.exports = require("../template")({
+module.exports = {
   "clear": "senin",
   "no-precipitation": "fără precipitații",
   "mixed-precipitation": "precipitații mixte",
@@ -129,16 +125,9 @@ module.exports = require("../template")({
   "stopping-then-starting-later": "$1, se oprește în $2, începe din nou $3 mai târziu",
   "for-day": "$1 de-a lungul zilei",
   "starting": "$1, începând de $2",
-  "until": function(condition, period) {
-    return condition + " până " + strip_prefix(period);
-  },
-  "until-starting-again": function(condition, a, b) {
-    return condition + " până " + strip_prefix(a) + ", începe din nou " + b;
-  },
-  "starting-continuing-until": function(condition, a, b) {
-    return condition + " începând de " + a + " și până " +
-           strip_prefix(b);
-  },
+  "until": "$1 până $2",
+  "until-starting-again": "$1 până $2, începe din nou $3",
+  "starting-continuing-until": "$1 începând de $2 și până $3",
   "during": "$1 $2",
   "for-week": "$1 pe toată durata săptămânii",
   "over-weekend": "$1 în weekend",
@@ -170,5 +159,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/ru.js b/lib/lang/ru.js
index 9b69386f..2bb3e6f6 100644
--- a/lib/lang/ru.js
+++ b/lib/lang/ru.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -14,84 +16,36 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-function time2(time)
-{
+function time2(time) {
   switch(time) {
-    case "утром":
-      time = "утра";
-      break;
-    case "днем":
-      time = "середины дня";
-      break;
-    case "вечером":
-      time = "вечера";
-      break;
-    case "ночью":
-      time = "ночи";
-      break;
-    case "сегодня утром":
-      time="сегодняшнего утра";
-      break;
-    case "сегодня поздним утром":
-      time="сегодняшнего позднего утра";
-      break;
-    case "сегодня днем":
-      time="середины дня";
-      break;
-    case "сегодня поздним днем":
-      time="сегодняшнего позднего дня";
-      break;
-    case "сегодня вечером":
-      time="сегодняшнего вечера";
-      break;
-    case "сегодня поздним вечером":
-      time="сегодняшнего позднего вечера";
-      break;
-    case "сегодня ночью":
-      time="сегодняшней ночи";
-      break;
-    case "сегодня поздней ночью":
-      time="сегодняшней поздней ночи";
-      break;
-    case "завтра утром":
-      time="завтрашнего утра";
-      break;
-    case "завтра днем":
-      time="завтрашнего дня";
-      break;
-    case "завтра вечером":
-      time="завтрашнего вечера";
-      break;
-    case "завтра ночью":
-      time="завтрашней ночи";
-      break;
-    case "в воскресенье":
-      time="воскресенья";
-      break;
-    case "в понедельник":
-      time="понедельника";
-      break;
-    case "во вторник":
-      time="вторника";
-      break;
-    case "в среду":
-      time="среды";
-      break;
-    case "в четверг":
-      time="четверга";
-      break;
-    case "в пятницу":
-      time="пятницы";
-      break;
-    case "в субботу":
-      time="субботы";
-      break;
-  };
-
-  return time;
+    case "утром": return "утра";
+    case "днем": return "середины дня";
+    case "вечером": return "вечера";
+    case "ночью": return "ночи";
+    case "сегодня утром": return "сегодняшнего утра";
+    case "сегодня поздним утром": return "сегодняшнего позднего утра";
+    case "сегодня днем": return "середины дня";
+    case "сегодня поздним днем": return "сегодняшнего позднего дня";
+    case "сегодня вечером": return "сегодняшнего вечера";
+    case "сегодня поздним вечером": return "сегодняшнего позднего вечера";
+    case "сегодня ночью": return "сегодняшней ночи";
+    case "сегодня поздней ночью": return "сегодняшней поздней ночи";
+    case "завтра утром": return "завтрашнего утра";
+    case "завтра днем": return "завтрашнего дня";
+    case "завтра вечером": return "завтрашнего вечера";
+    case "завтра ночью": return "завтрашней ночи";
+    case "в воскресенье": return "воскресенья";
+    case "в понедельник": return "понедельника";
+    case "во вторник": return "вторника";
+    case "в среду": return "среды";
+    case "в четверг": return "четверга";
+    case "в пятницу": return "пятницы";
+    case "в субботу": return "субботы";
+    default: return time;
+  }
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "ясно",
   "no-precipitation": "без осадков",
   "mixed-precipitation": "смешанные осадки",
@@ -227,5 +181,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/sk.js b/lib/lang/sk.js
index bae9f290..d195d18d 100644
--- a/lib/lang/sk.js
+++ b/lib/lang/sk.js
@@ -1,6 +1,4 @@
-function endsWith(str, suffix) {
-  return str.indexOf(suffix, str.length - suffix.length) !== -1;
-}
+"use strict";
 
 function remove_prefix_and_use_genitive(a) {
   switch(a) {
@@ -90,13 +88,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-function strip_prefix(period) {
-  return period.slice(0, 9) === "overnight" ? period.slice(4) :
-         period.slice(0, 7) ===   "in the " ? period.slice(7) :
-                                              period;
-}
-
-module.exports = require("../template")({
+module.exports = {
   "clear": "jasno",
   "no-precipitation": "bez zrážok",
   "mixed-precipitation": "zmiešané zrážky",
@@ -202,30 +194,30 @@ module.exports = require("../template")({
   },
   "until-starting-again": function(condition, a, b) {
     var starting = "";
-    if(endsWith(condition, "zrážky"))
+    if(condition.endsWith("zrážky"))
       starting = ", ktoré začnú znovu ";
-    else if(endsWith(condition, "dážď") || endsWith(condition, "dážď so snehom") || endsWith(condition, "vietor"))
+    else if(condition.endsWith("dážď") || condition.endsWith("dážď so snehom") || condition.endsWith("vietor"))
       starting = ", ktorý začne znovu ";
-    else if(endsWith(condition, "sneženie") || endsWith(condition, "mrholenie"))
+    else if(condition.endsWith("sneženie") || condition.endsWith("mrholenie"))
       starting = ", ktoré začne znovu ";
-    else if(endsWith(condition, "vlhkosť"))
+    else if(condition.endsWith("vlhkosť"))
       starting = ", ktorá začne znovu ";
-    else if(endsWith(condition, "zamračené") || endsWith(condition, "hmlisto"))
+    else if(condition.endsWith("zamračené") || condition.endsWith("hmlisto"))
       starting = "a začne znovu ";
     
     return condition + " až do " + remove_prefix_and_use_genitive(a) + starting + b;
   },
   "starting-continuing-until": function(condition, a, b) {
     var continuing = "";
-    if(endsWith(condition, "zrážky"))
+    if(condition.endsWith("zrážky"))
       continuing = ", ktoré pretrvajú až do ";
-    else if(endsWith(condition, "dážď") || endsWith(condition, "dážď so snehom") || endsWith(condition, "vietor"))
+    else if(condition.endsWith("dážď") || condition.endsWith("dážď so snehom") || condition.endsWith("vietor"))
       continuing = ", ktorý pretrvá až do ";
-    else if(endsWith(condition, "sneženie") || endsWith(condition, "mrholenie"))
+    else if(condition.endsWith("sneženie") || condition.endsWith("mrholenie"))
       continuing = ", ktoré pretrvá až do ";
-    else if(endsWith(condition, "vlhkosť"))
+    else if(condition.endsWith("vlhkosť"))
       continuing = ", ktorá pretrvá až do ";
-    else if(endsWith(condition, "zamračené") || endsWith(condition, "hmlisto"))
+    else if(condition.endsWith("zamračené") || condition.endsWith("hmlisto"))
       continuing = " a pretrvá až do ";
     return "od " + remove_prefix_and_use_genitive(a) + " " + condition + continuing + remove_prefix_and_use_genitive(b);
   },
@@ -250,5 +242,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/sl.js b/lib/lang/sl.js
index 3ee2d685..d872d373 100644
--- a/lib/lang/sl.js
+++ b/lib/lang/sl.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -14,13 +16,7 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-function strip_prefix(period) {
-  return period.slice(0, 9) === "overnight" ? period.slice(4) :
-         period.slice(0, 7) ===   "in the " ? period.slice(7) :
-                                              period;
-}
-
-module.exports = require("../template")({
+module.exports = {
   "clear": "jasno",
   "no-precipitation": "brez padavin",
   "mixed-precipitation": "možne padavine",
@@ -115,16 +111,9 @@ module.exports = require("../template")({
   "stopping-then-starting-later": "$1 do $2, začelo bo zopet $3 kasneje",
   "for-day": "$1 čez dan",
   "starting": "$1 od $2",
-  "until": function(condition, period) {
-    return condition + " do " + strip_prefix(period);
-  },
-  "until-starting-again": function(condition, a, b) {
-    return condition + " do " + strip_prefix(a) + ", začelo bo zopet " + b;
-  },
-  "starting-continuing-until": function(condition, a, b) {
-    return condition + " začel " + a + ", do " +
-           strip_prefix(b);
-  },
+  "until": "$1 do $2",
+  "until-starting-again": "$1 do $2, začelo bo zopet $3",
+  "starting-continuing-until": "$1 začel $2, do $3",
   "during": "$1 $2",
   "for-week": "$1 čez teden",
   "over-weekend": "$1 v soboto in nedeljo",
@@ -146,5 +135,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
\ No newline at end of file
+  },
+};
diff --git a/lib/lang/sr.js b/lib/lang/sr.js
index aab0ceeb..ecfc3b88 100644
--- a/lib/lang/sr.js
+++ b/lib/lang/sr.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -89,7 +91,7 @@ function get_prefix(a, t) {
   }
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "vedro", 
   "no-precipitation": "nema padavina",
   "mixed-precipitation": "različite padavine",
@@ -238,5 +240,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/sv.js b/lib/lang/sv.js
index c0a096ce..105075fb 100644
--- a/lib/lang/sv.js
+++ b/lib/lang/sv.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -25,7 +27,7 @@ function grammar(str) {
             .replace(/(ån|is|ns|rs|re|ör|ön)(dag)/gi, "$1dagen");
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "klart",
   "no-precipitation": "ingen mätbar nederbörd",
   "mixed-precipitation": "blandad nederbörd",
@@ -165,5 +167,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/tet.js b/lib/lang/tet.js
index 3c5e86a4..0c4ece47 100644
--- a/lib/lang/tet.js
+++ b/lib/lang/tet.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var i = 0;
 
@@ -18,7 +20,7 @@ function strip_prefix(period) {
                                               period;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "pas",
   "no-precipitation": "udan la iha",
   "mixed-precipitation": "udan - maran kahur",
@@ -148,5 +150,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/tr.js b/lib/lang/tr.js
index b1f997db..b138f62f 100644
--- a/lib/lang/tr.js
+++ b/lib/lang/tr.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a,joiner1,b,joiner2) {
  var m = a,
       i = 0,
@@ -14,7 +16,7 @@ function join_with_shared_prefix(a,joiner1,b,joiner2) {
   return a + joiner1 + b.slice(i)+joiner2;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "açık hava",
   "no-precipitation": "yağış yok",
   "mixed-precipitation": "karışık yağış",
@@ -133,5 +135,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/uk.js b/lib/lang/uk.js
index a9a7cee7..0ab70294 100644
--- a/lib/lang/uk.js
+++ b/lib/lang/uk.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -14,84 +16,36 @@ function join_with_shared_prefix(a, b, joiner) {
   return a + joiner + b.slice(i);
 }
 
-function time2(time)
-{
+function time2(time) {
   switch(time) {
-    case "вранці":
-      time = "ранку";
-      break;
-    case "вдень":
-      time = "середини дня";
-      break;
-    case "ввечері":
-      time = "вечору";
-      break;
-    case "вночі":
-      time = "ночі";
-      break;
-    case "сьогодні вранці":
-      time="сьогоднішнього ранку";
-      break;
-    case "сьогодні пізно вранці":
-      time="сьогоднішнього пізнього ранку";
-      break;
-    case "сьогодні вдень":
-      time="середини дня";
-      break;
-    case "сьогодні пізно вдень":
-      time="сьогоднішнього пізнього дня";
-      break;
-    case "сьогодні ввечері":
-      time="сьогоднішнього вечору";
-      break;
-    case "сьогодні пізно ввечері":
-      time="сьогоднішнього пізнього вечору";
-      break;
-    case "сьогодні вночі":
-      time="сьогоднішньої ночі";
-      break;
-    case "сьогодні пізно вночі":
-      time="сьогоднішньої пізньої ночі";
-      break;
-    case "завтра вранці":
-      time="завтрашнього ранку";
-      break;
-    case "завтра вдень":
-      time="завтрашнього дня";
-      break;
-    case "завтра ввечері":
-      time="завтрашнього вечору";
-      break;
-    case "завтра вночі":
-      time="завтрашньої ночі";
-      break;
-    case "у неділю":
-      time="неділі";
-      break;
-    case "в понеділок":
-      time="понеділка";
-      break;
-    case "у вівторок":
-      time="вівторка";
-      break;
-    case "в середу":
-      time="середи";
-      break;
-    case "в четвер":
-      time="четверга";
-      break;
-    case "в п'ятницю":
-      time="п'ятниці";
-      break;
-    case "в суботу":
-      time="суботи";
-      break;
-  };
-
-  return time;
+    case "вранці": return "ранку";
+    case "вдень": return "середини дня";
+    case "ввечері": return "вечору";
+    case "вночі": return "ночі";
+    case "сьогодні вранці": return "сьогоднішнього ранку";
+    case "сьогодні пізно вранці": return "сьогоднішнього пізнього ранку";
+    case "сьогодні вдень": return "середини дня";
+    case "сьогодні пізно вдень": return "сьогоднішнього пізнього дня";
+    case "сьогодні ввечері": return "сьогоднішнього вечору";
+    case "сьогодні пізно ввечері": return "сьогоднішнього пізнього вечору";
+    case "сьогодні вночі": return "сьогоднішньої ночі";
+    case "сьогодні пізно вночі": return "сьогоднішньої пізньої ночі";
+    case "завтра вранці": return "завтрашнього ранку";
+    case "завтра вдень": return "завтрашнього дня";
+    case "завтра ввечері": return "завтрашнього вечору";
+    case "завтра вночі": return "завтрашньої ночі";
+    case "у неділю": return "неділі";
+    case "в понеділок": return "понеділка";
+    case "у вівторок": return "вівторка";
+    case "в середу": return "середи";
+    case "в четвер": return "четверга";
+    case "в п'ятницю": return "п'ятниці";
+    case "в суботу": return "суботи";
+    default: return time;
+  }
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "ясно",
   "no-precipitation": "без опадів",
   "mixed-precipitation": "змішані опади",
@@ -227,5 +181,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/x-pig-latin.js b/lib/lang/x-pig-latin.js
index 6d70291f..e6f4ade7 100644
--- a/lib/lang/x-pig-latin.js
+++ b/lib/lang/x-pig-latin.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function join_with_shared_prefix(a, b, joiner) {
   var m = a,
       i = 0,
@@ -21,17 +23,17 @@ function join_with_shared_prefix(a, b, joiner) {
 
 function strip_prefix(period) {
   if(period.slice(0, 12) === "overnightway") {
-    period = period.slice(12);
-    return 'ightnay'+period;
-  
-  } else if(period.slice(0, 12)  ===  "inway ethay ") {
+    return "ightnay" + period.slice(12);
+  }
+
+  if(period.slice(0, 12) === "inway ethay ") {
     return period.slice(12);
   }
   
   return period;
 }
 
-module.exports = require("../template")({
+module.exports = {
   "clear": "earclay",
   "no-precipitation": "onay ecipitationpray",
   "mixed-precipitation": "ixedmay ecipitationpray",
@@ -166,5 +168,5 @@ module.exports = require("../template")({
       str += ".";
 
     return str;
-  }
-});
+  },
+};
diff --git a/lib/lang/zh-tw.js b/lib/lang/zh-tw.js
index d76db89c..44f10f24 100644
--- a/lib/lang/zh-tw.js
+++ b/lib/lang/zh-tw.js
@@ -1,5 +1,6 @@
 "use strict";
-module.exports = require("../template")({
+
+module.exports = {
   "clear": "晴朗",
   "no-precipitation": "無降水",
   "mixed-precipitation": "多雲轉雨",
@@ -100,4 +101,4 @@ module.exports = require("../template")({
   "temperatures-falling": "$2溫度下降到$1",
   "title": "$1",
   "sentence": a => a.endsWith("。")? a: a + "。",
-});
+};
diff --git a/lib/lang/zh.js b/lib/lang/zh.js
index 13cdbf9b..c19475bc 100644
--- a/lib/lang/zh.js
+++ b/lib/lang/zh.js
@@ -1,5 +1,6 @@
 "use strict";
-module.exports = require("../template")({
+
+module.exports = {
   "clear": "晴朗",
   "no-precipitation": "无降水",
   "mixed-precipitation": "多云转雨",
@@ -100,4 +101,4 @@ module.exports = require("../template")({
   "temperatures-falling": "$2温度下降到$1",
   "title": "$1",
   "sentence": a => a.endsWith("。")? a: a + "。",
-});
+};
diff --git a/lib/template.js b/lib/translation.js
similarity index 90%
rename from lib/template.js
rename to lib/translation.js
index 4b5c817e..5f505c96 100644
--- a/lib/template.js
+++ b/lib/translation.js
@@ -95,4 +95,18 @@ function parse(template, expr, stack) {
   return result;
 }
 
-module.exports = template => expr => parse(template, expr, []);
+class Translation {
+  constructor(template) {
+    this.template = template;
+  }
+
+  translate(expr) {
+    return parse(this.template, expr, []);
+  }
+
+  is_supported(term) {
+    return term in this.template;
+  }
+}
+
+module.exports = Translation;
diff --git a/test.js b/test.js
index a21e9a13..5836e562 100644
--- a/test.js
+++ b/test.js
@@ -1,149 +1,134 @@
 "use strict";
-const assert      = require("assert"),
-      fs          = require("fs"),
-      path        = require("path"),
-      template    = require("./lib/template"),
-      translation = require("./"),
-      util        = require("util");
-
-describe("translation", () => {
-  describe("template", () => {
-    const convert = template({
-            "foo": "bar",
-            "bar": "meeple $2",
-            "baz": (a, b) => "meeple " + b,
-            "quux": () => "glorple",
-          });
+const assert = require("assert");
+const Translation = require("./lib/translation");
+const translations = require("./");
+
+describe("translations", () => {
+  describe("Translation", () => {
+    const test = new Translation({
+      "foo": "bar",
+      "bar": "meeple $2",
+      "baz": (a, b) => "meeple " + b,
+      "quux": () => "glorple",
+    });
 
     it("should return a number in string form", () => {
-      assert.strictEqual(convert(42), "42");
+      assert.strictEqual(test.translate(42), "42");
     });
 
     it("should throw an error given an unrecognized string", () => {
-      assert.throws(() => { convert("42"); });
+      assert.throws(() => { test.translate("42"); });
     });
 
     it("should apply an expected value conversion", () => {
-      assert.strictEqual(convert("foo"), "bar");
+      assert.strictEqual(test.translate("foo"), "bar");
     });
 
     it("should throw an error given a value expected to be a string", () => {
-      assert.throws(() => { convert("bar"); });
+      assert.throws(() => { test.translate("bar"); });
     });
 
     it("should throw an error given a value expected to be a function", () => {
-      assert.throws(() => { convert("baz"); });
+      assert.throws(() => { test.translate("baz"); });
     });
 
     it("should throw an error given an empty array", () => {
-      assert.throws(() => { convert([]); });
+      assert.throws(() => { test.translate([]); });
     });
 
     it("should apply a string template", () => {
-      assert.strictEqual(convert(["bar", 10, 20]), "meeple 20");
+      assert.strictEqual(test.translate(["bar", 10, 20]), "meeple 20");
     });
 
     it("should fail to apply a function with the wrong arity", () => {
-      assert.throws(() => { convert(["baz", 10, 20, 30]); });
+      assert.throws(() => { test.translate(["baz", 10, 20, 30]); });
     });
 
     it("should apply a function template", () => {
-      assert.strictEqual(convert(["baz", 10, 20]), "meeple 20");
+      assert.strictEqual(test.translate(["baz", 10, 20]), "meeple 20");
     });
 
     it("should recursively apply function templates", () => {
       /* Actually, a "meeple meeple bar" sounds like it'd be a pretty tasty
        * candy treat. */
       assert.strictEqual(
-        convert(["bar", 10, ["baz", 20, "foo"]]),
+        test.translate(["bar", 10, ["baz", 20, "foo"]]),
         "meeple meeple bar"
       );
     });
 
     it("should throw an error given undefined", () => {
-      assert.throws(() => { convert(undefined); });
+      assert.throws(() => { test.translate(undefined); });
     });
 
     it("should throw an error given null", () => {
-      assert.throws(() => { convert(null); });
+      assert.throws(() => { test.translate(null); });
     });
 
     it("should throw an error given an object", () => {
-      assert.throws(() => { convert({}); });
+      assert.throws(() => { test.translate({}); });
     });
 
     it("should apply a zero-argument function", () => {
-      assert.strictEqual(convert("quux"), "glorple");
+      assert.strictEqual(test.translate("quux"), "glorple");
     });
 
     it("should fail to apply a zero-argument function given arguments", () => {
-      assert.throws(() => { convert(["quux"]); });
+      assert.throws(() => { test.translate(["quux"]); });
     });
 
     it("should fail to apply a function template given a value", () => {
-      assert.throws(() => { convert("baz"); });
+      assert.throws(() => { test.translate("baz"); });
     });
 
     it("should provide context to functions", () => {
-      const convert = template({
-              "foo": function(a, b, c) {
-                assert.deepEqual(this, ["foo"]);
-                return "Moop.";
-              },
-              "bar": function() {
-                assert.deepEqual(this, ["foo", "bar"]);
-                return "Boop.";
-              },
-              "baz": function(a) {
-                assert.deepEqual(this, ["foo", "baz"]);
-                return "Soup.";
-              },
-              "quux": function() {
-                assert.deepEqual(this, ["foo", "baz", "quux"]);
-                return "Floop.";
-              },
-              "neem": function(a) {
-                assert.deepEqual(this, ["foo", "neem"]);
-                return "Bloop.";
-              },
-              "glorp": function(a) {
-                assert.deepEqual(this, ["foo", "neem", "glorp"]);
-                return "Rope?";
-              }
-            });
-
-      convert(["foo", "bar", ["baz", "quux"], ["neem", ["glorp", 42]]]);
+      const test = new Translation({
+        "foo": function(a, b, c) {
+          assert.deepEqual(this, ["foo"]);
+          return "Moop.";
+        },
+        "bar": function() {
+          assert.deepEqual(this, ["foo", "bar"]);
+          return "Boop.";
+        },
+        "baz": function(a) {
+          assert.deepEqual(this, ["foo", "baz"]);
+          return "Soup.";
+        },
+        "quux": function() {
+          assert.deepEqual(this, ["foo", "baz", "quux"]);
+          return "Floop.";
+        },
+        "neem": function(a) {
+          assert.deepEqual(this, ["foo", "neem"]);
+          return "Bloop.";
+        },
+        "glorp": function(a) {
+          assert.deepEqual(this, ["foo", "neem", "glorp"]);
+          return "Rope?";
+        }
+      });
+
+      test.translate(["foo", "bar", ["baz", "quux"], ["neem", ["glorp", 42]]]);
     });
   });
 
-  describe("language", () => {
-    fs.readdirSync(path.join(__dirname, "test_cases")).forEach(lang => {
-      if(lang.charAt(0) === ".") {
-        return;
-      }
-
-      const name      = path.basename(lang, ".json"),
-            translate = translation[name];
-
-      describe(name, () => {
-        const cases = JSON.parse(
-                fs.readFileSync(
-                  path.join(__dirname, "test_cases", lang),
-                  "utf8"
-                )
-            );
-            
-        Object.keys(cases).forEach(summary => {
+  describe("languages", () => {
+    for(const lang in translations) {
+      describe(lang, () => {
+        const translation = translations[lang];
+        const cases = require("./test_cases/" + lang);
+
+        for(const summary in cases) {
           const source = cases[summary];
 
           it(
-            util.format("should translate %j to \"%s\"", source, summary),
-            () => {
-              assert.strictEqual(translate(source), summary);
-            }
+            "should translate " + JSON.stringify(source) +
+              " to " + JSON.stringify(summary), 
+            () => assert.strictEqual(translation.translate(source), summary)
           );
-        });
+        }
       });
-    });
+    }
   });
 });
diff --git a/test_cases/en.json b/test_cases/en.json
index 2f0368e9..1c6fad7e 100644
--- a/test_cases/en.json
+++ b/test_cases/en.json
@@ -201,35 +201,35 @@
       "afternoon"]],
 
 
-  "No precipitation throughout the week, with temperatures peaking at 85\u00B0F tomorrow.":
+  "No precipitation throughout the week, with high temperatures peaking at 85\u00B0F tomorrow.":
     ["sentence", ["with",
       ["for-week", "no-precipitation"],
       ["temperatures-peaking",
         ["fahrenheit", 85],
         "tomorrow"]]],
 
-  "Mixed precipitation over the weekend, with temperatures rising to 32\u00B0C on Thursday.":
+  "Mixed precipitation over the weekend, with high temperatures rising to 32\u00B0C on Thursday.":
     ["sentence", ["with",
       ["over-weekend", "mixed-precipitation"],
       ["temperatures-rising",
         ["celsius", 32],
         "thursday"]]],
 
-  "Drizzle on Monday, with temperatures bottoming out at 15\u00B0F on Friday.":
+  "Drizzle on Monday, with high temperatures bottoming out at 15\u00B0F on Friday.":
     ["sentence", ["with",
       ["during", "very-light-rain", "monday"],
       ["temperatures-valleying",
         ["fahrenheit", 15],
         "friday"]]],
 
-  "Light snow on Tuesday and next Wednesday, with temperatures falling to 0\u00B0C on Sunday.":
+  "Light snow on Tuesday and next Wednesday, with high temperatures falling to 0\u00B0C on Sunday.":
     ["sentence", ["with",
       ["during", "light-snow", ["and", "tuesday", "next-wednesday"]],
       ["temperatures-falling",
         ["celsius", 0],
         "sunday"]]],
 
-  "Precipitation today through Saturday, with temperatures peaking at 100\u00B0F on Monday.":
+  "Precipitation today through Saturday, with high temperatures peaking at 100\u00B0F on Monday.":
     ["sentence", ["with",
       ["during",
         "medium-precipitation",
diff --git a/test_cases/fr.json b/test_cases/fr.json
index a9cb8c27..9344fbec 100644
--- a/test_cases/fr.json
+++ b/test_cases/fr.json
@@ -201,35 +201,35 @@
       "afternoon"]],
 
 
-  "Pas de précipitations pendant toute la semaine, avec des températures atteignant 85\u00B0F demain.":
+  "Pas de précipitations pendant toute la semaine, avec des températures maximales atteignant 85\u00B0F demain.":
     ["sentence", ["with",
       ["for-week", "no-precipitation"],
       ["temperatures-peaking",
         ["fahrenheit", 85],
         "tomorrow"]]],
 
-  "Précipitations mêlées pendant tout le week-end, avec des températures montant jusqu’à 32\u00B0C jeudi.":
+  "Précipitations mêlées pendant tout le week-end, avec des températures maximales montant jusqu’à 32\u00B0C jeudi.":
     ["sentence", ["with",
       ["over-weekend", "mixed-precipitation"],
       ["temperatures-rising",
         ["celsius", 32],
         "thursday"]]],
 
-  "Bruine aujourd’hui, avec des températures atteignant 15\u00B0F vendredi.":
+  "Bruine aujourd’hui, avec des températures maximales atteignant 15\u00B0F vendredi.":
     ["sentence", ["with",
       ["during", "very-light-rain", "today"],
       ["temperatures-valleying",
         ["fahrenheit", 15],
         "friday"]]],
 
-  "Neige faible lundi et mardi, avec des températures descendant jusqu’à 0\u00B0C dimanche.":
+  "Neige faible lundi et mardi, avec des températures maximales descendant jusqu’à 0\u00B0C dimanche.":
     ["sentence", ["with",
       ["during", "light-snow", ["and", "monday", "tuesday"]],
       ["temperatures-falling",
         ["celsius", 0],
         "sunday"]]],
 
-  "Précipitations mercredi jusqu’à samedi, avec des températures atteignant 100\u00B0F lundi.":
+  "Précipitations mercredi jusqu’à samedi, avec des températures maximales atteignant 100\u00B0F lundi.":
     ["sentence", ["with",
       ["during",
         "medium-precipitation",
diff --git a/test_cases/nb.json b/test_cases/no.json
similarity index 100%
rename from test_cases/nb.json
rename to test_cases/no.json