diff --git a/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.indexpattern.addscriptedfield.md b/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.indexpattern.addscriptedfield.md
index cc3468531fffa..99d2fc00a6b7b 100644
--- a/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.indexpattern.addscriptedfield.md
+++ b/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.indexpattern.addscriptedfield.md
@@ -9,7 +9,7 @@ Add scripted field to field list
 <b>Signature:</b>
 
 ```typescript
-addScriptedField(name: string, script: string, fieldType?: string, lang?: string): Promise<void>;
+addScriptedField(name: string, script: string, fieldType?: string): Promise<void>;
 ```
 
 ## Parameters
@@ -19,7 +19,6 @@ addScriptedField(name: string, script: string, fieldType?: string, lang?: string
 |  name | <code>string</code> |  |
 |  script | <code>string</code> |  |
 |  fieldType | <code>string</code> |  |
-|  lang | <code>string</code> |  |
 
 <b>Returns:</b>
 
diff --git a/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.indexpattern.istimebasedwildcard.md b/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.indexpattern.istimebasedwildcard.md
deleted file mode 100644
index 27f99f418a078..0000000000000
--- a/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.indexpattern.istimebasedwildcard.md
+++ /dev/null
@@ -1,15 +0,0 @@
-<!-- Do not edit this file. It is automatically generated by API Documenter. -->
-
-[Home](./index.md) &gt; [kibana-plugin-plugins-data-public](./kibana-plugin-plugins-data-public.md) &gt; [IndexPattern](./kibana-plugin-plugins-data-public.indexpattern.md) &gt; [isTimeBasedWildcard](./kibana-plugin-plugins-data-public.indexpattern.istimebasedwildcard.md)
-
-## IndexPattern.isTimeBasedWildcard() method
-
-<b>Signature:</b>
-
-```typescript
-isTimeBasedWildcard(): boolean;
-```
-<b>Returns:</b>
-
-`boolean`
-
diff --git a/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.indexpattern.md b/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.indexpattern.md
index 2ff575bc4fc22..325b97383e328 100644
--- a/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.indexpattern.md
+++ b/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.indexpattern.md
@@ -41,7 +41,7 @@ export declare class IndexPattern implements IIndexPattern
 
 |  Method | Modifiers | Description |
 |  --- | --- | --- |
-|  [addScriptedField(name, script, fieldType, lang)](./kibana-plugin-plugins-data-public.indexpattern.addscriptedfield.md) |  | Add scripted field to field list |
+|  [addScriptedField(name, script, fieldType)](./kibana-plugin-plugins-data-public.indexpattern.addscriptedfield.md) |  | Add scripted field to field list |
 |  [getAggregationRestrictions()](./kibana-plugin-plugins-data-public.indexpattern.getaggregationrestrictions.md) |  |  |
 |  [getAsSavedObjectBody()](./kibana-plugin-plugins-data-public.indexpattern.getassavedobjectbody.md) |  | Returns index pattern as saved object body for saving |
 |  [getComputedFields()](./kibana-plugin-plugins-data-public.indexpattern.getcomputedfields.md) |  |  |
@@ -52,7 +52,6 @@ export declare class IndexPattern implements IIndexPattern
 |  [getSourceFiltering()](./kibana-plugin-plugins-data-public.indexpattern.getsourcefiltering.md) |  | Get the source filtering configuration for that index. |
 |  [getTimeField()](./kibana-plugin-plugins-data-public.indexpattern.gettimefield.md) |  |  |
 |  [isTimeBased()](./kibana-plugin-plugins-data-public.indexpattern.istimebased.md) |  |  |
-|  [isTimeBasedWildcard()](./kibana-plugin-plugins-data-public.indexpattern.istimebasedwildcard.md) |  |  |
 |  [isTimeNanosBased()](./kibana-plugin-plugins-data-public.indexpattern.istimenanosbased.md) |  |  |
 |  [popularizeField(fieldName, unit)](./kibana-plugin-plugins-data-public.indexpattern.popularizefield.md) |  |  |
 |  [removeScriptedField(fieldName)](./kibana-plugin-plugins-data-public.indexpattern.removescriptedfield.md) |  | Remove scripted field from field list |
diff --git a/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.indexpattern.addscriptedfield.md b/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.indexpattern.addscriptedfield.md
index 6d206e88b5b56..a86fea3106225 100644
--- a/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.indexpattern.addscriptedfield.md
+++ b/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.indexpattern.addscriptedfield.md
@@ -9,7 +9,7 @@ Add scripted field to field list
 <b>Signature:</b>
 
 ```typescript
-addScriptedField(name: string, script: string, fieldType?: string, lang?: string): Promise<void>;
+addScriptedField(name: string, script: string, fieldType?: string): Promise<void>;
 ```
 
 ## Parameters
@@ -19,7 +19,6 @@ addScriptedField(name: string, script: string, fieldType?: string, lang?: string
 |  name | <code>string</code> |  |
 |  script | <code>string</code> |  |
 |  fieldType | <code>string</code> |  |
-|  lang | <code>string</code> |  |
 
 <b>Returns:</b>
 
diff --git a/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.indexpattern.istimebasedwildcard.md b/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.indexpattern.istimebasedwildcard.md
deleted file mode 100644
index 7ef5e8318040a..0000000000000
--- a/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.indexpattern.istimebasedwildcard.md
+++ /dev/null
@@ -1,15 +0,0 @@
-<!-- Do not edit this file. It is automatically generated by API Documenter. -->
-
-[Home](./index.md) &gt; [kibana-plugin-plugins-data-server](./kibana-plugin-plugins-data-server.md) &gt; [IndexPattern](./kibana-plugin-plugins-data-server.indexpattern.md) &gt; [isTimeBasedWildcard](./kibana-plugin-plugins-data-server.indexpattern.istimebasedwildcard.md)
-
-## IndexPattern.isTimeBasedWildcard() method
-
-<b>Signature:</b>
-
-```typescript
-isTimeBasedWildcard(): boolean;
-```
-<b>Returns:</b>
-
-`boolean`
-
diff --git a/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.indexpattern.md b/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.indexpattern.md
index d877854444a09..e5a9e7d8f9f93 100644
--- a/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.indexpattern.md
+++ b/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.indexpattern.md
@@ -41,7 +41,7 @@ export declare class IndexPattern implements IIndexPattern
 
 |  Method | Modifiers | Description |
 |  --- | --- | --- |
-|  [addScriptedField(name, script, fieldType, lang)](./kibana-plugin-plugins-data-server.indexpattern.addscriptedfield.md) |  | Add scripted field to field list |
+|  [addScriptedField(name, script, fieldType)](./kibana-plugin-plugins-data-server.indexpattern.addscriptedfield.md) |  | Add scripted field to field list |
 |  [getAggregationRestrictions()](./kibana-plugin-plugins-data-server.indexpattern.getaggregationrestrictions.md) |  |  |
 |  [getAsSavedObjectBody()](./kibana-plugin-plugins-data-server.indexpattern.getassavedobjectbody.md) |  | Returns index pattern as saved object body for saving |
 |  [getComputedFields()](./kibana-plugin-plugins-data-server.indexpattern.getcomputedfields.md) |  |  |
@@ -52,7 +52,6 @@ export declare class IndexPattern implements IIndexPattern
 |  [getSourceFiltering()](./kibana-plugin-plugins-data-server.indexpattern.getsourcefiltering.md) |  | Get the source filtering configuration for that index. |
 |  [getTimeField()](./kibana-plugin-plugins-data-server.indexpattern.gettimefield.md) |  |  |
 |  [isTimeBased()](./kibana-plugin-plugins-data-server.indexpattern.istimebased.md) |  |  |
-|  [isTimeBasedWildcard()](./kibana-plugin-plugins-data-server.indexpattern.istimebasedwildcard.md) |  |  |
 |  [isTimeNanosBased()](./kibana-plugin-plugins-data-server.indexpattern.istimenanosbased.md) |  |  |
 |  [popularizeField(fieldName, unit)](./kibana-plugin-plugins-data-server.indexpattern.popularizefield.md) |  |  |
 |  [removeScriptedField(fieldName)](./kibana-plugin-plugins-data-server.indexpattern.removescriptedfield.md) |  | Remove scripted field from field list |
diff --git a/src/plugins/data/common/index_patterns/index_patterns/index_pattern.test.ts b/src/plugins/data/common/index_patterns/index_patterns/index_pattern.test.ts
index 91286a38f16a0..bfb5fd9da56e6 100644
--- a/src/plugins/data/common/index_patterns/index_patterns/index_pattern.test.ts
+++ b/src/plugins/data/common/index_patterns/index_patterns/index_pattern.test.ts
@@ -179,8 +179,7 @@ describe('IndexPattern', () => {
       await indexPattern.addScriptedField(
         scriptedField.name,
         scriptedField.script,
-        scriptedField.type,
-        'lang'
+        scriptedField.type
       );
 
       const scriptedFields = indexPattern.getScriptedFields();
@@ -206,7 +205,7 @@ describe('IndexPattern', () => {
       const scriptedField = last(scriptedFields) as any;
       expect.assertions(1);
       try {
-        await indexPattern.addScriptedField(scriptedField.name, "'new script'", 'string', 'lang');
+        await indexPattern.addScriptedField(scriptedField.name, "'new script'", 'string');
       } catch (e) {
         expect(e).toBeInstanceOf(DuplicateField);
       }
diff --git a/src/plugins/data/common/index_patterns/index_patterns/index_pattern.ts b/src/plugins/data/common/index_patterns/index_patterns/index_pattern.ts
index 882235889b55c..e880c3a9ff825 100644
--- a/src/plugins/data/common/index_patterns/index_patterns/index_pattern.ts
+++ b/src/plugins/data/common/index_patterns/index_patterns/index_pattern.ts
@@ -234,12 +234,7 @@ export class IndexPattern implements IIndexPattern {
    * @param fieldType
    * @param lang
    */
-  async addScriptedField(
-    name: string,
-    script: string,
-    fieldType: string = 'string',
-    lang: string = 'painless'
-  ) {
+  async addScriptedField(name: string, script: string, fieldType: string = 'string') {
     const scriptedFields = this.getScriptedFields();
     const names = _.map(scriptedFields, 'name');
 
@@ -252,7 +247,7 @@ export class IndexPattern implements IIndexPattern {
       script,
       type: fieldType,
       scripted: true,
-      lang,
+      lang: 'painless',
       aggregatable: true,
       searchable: true,
       count: 0,
@@ -322,13 +317,9 @@ export class IndexPattern implements IIndexPattern {
     return timeField && timeField.esTypes && timeField.esTypes.indexOf('date_nanos') !== -1;
   }
 
-  isTimeBasedWildcard(): boolean {
-    return this.isTimeBased() && this.isWildcard();
-  }
-
   getTimeField() {
     if (!this.timeFieldName || !this.fields || !this.fields.getByName) return undefined;
-    return this.fields.getByName(this.timeFieldName) || undefined;
+    return this.fields.getByName(this.timeFieldName);
   }
 
   getFieldByName(name: string): IndexPatternField | undefined {
@@ -340,13 +331,6 @@ export class IndexPattern implements IIndexPattern {
     return this.typeMeta?.aggs;
   }
 
-  /**
-   * Does this index pattern title include a '*'
-   */
-  private isWildcard() {
-    return _.includes(this.title, '*');
-  }
-
   /**
    * Returns index pattern as saved object body for saving
    */
diff --git a/src/plugins/data/public/public.api.md b/src/plugins/data/public/public.api.md
index 6b419f6995447..9c059c0f35892 100644
--- a/src/plugins/data/public/public.api.md
+++ b/src/plugins/data/public/public.api.md
@@ -1086,7 +1086,7 @@ export type IMetricAggType = MetricAggType;
 export class IndexPattern implements IIndexPattern {
     // Warning: (ae-forgotten-export) The symbol "IndexPatternDeps" needs to be exported by the entry point index.d.ts
     constructor({ spec, savedObjectsClient, fieldFormats, shortDotsEnable, metaFields, }: IndexPatternDeps);
-    addScriptedField(name: string, script: string, fieldType?: string, lang?: string): Promise<void>;
+    addScriptedField(name: string, script: string, fieldType?: string): Promise<void>;
     // (undocumented)
     fieldFormatMap: Record<string, any>;
     // (undocumented)
@@ -1159,8 +1159,6 @@ export class IndexPattern implements IIndexPattern {
     // (undocumented)
     isTimeBased(): boolean;
     // (undocumented)
-    isTimeBasedWildcard(): boolean;
-    // (undocumented)
     isTimeNanosBased(): boolean;
     // (undocumented)
     metaFields: string[];
diff --git a/src/plugins/data/server/server.api.md b/src/plugins/data/server/server.api.md
index 9cf7234c4a9ff..eefc373559afb 100644
--- a/src/plugins/data/server/server.api.md
+++ b/src/plugins/data/server/server.api.md
@@ -624,7 +624,7 @@ export type IMetricAggType = MetricAggType;
 export class IndexPattern implements IIndexPattern {
     // Warning: (ae-forgotten-export) The symbol "IndexPatternDeps" needs to be exported by the entry point index.d.ts
     constructor({ spec, savedObjectsClient, fieldFormats, shortDotsEnable, metaFields, }: IndexPatternDeps);
-    addScriptedField(name: string, script: string, fieldType?: string, lang?: string): Promise<void>;
+    addScriptedField(name: string, script: string, fieldType?: string): Promise<void>;
     // (undocumented)
     fieldFormatMap: Record<string, any>;
     // Warning: (ae-forgotten-export) The symbol "IIndexPatternFieldList" needs to be exported by the entry point index.d.ts
@@ -701,8 +701,6 @@ export class IndexPattern implements IIndexPattern {
     // (undocumented)
     isTimeBased(): boolean;
     // (undocumented)
-    isTimeBasedWildcard(): boolean;
-    // (undocumented)
     isTimeNanosBased(): boolean;
     // (undocumented)
     metaFields: string[];