diff --git a/config/application.rb b/config/application.rb
index c4cbe173642..f899203330b 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -43,7 +43,7 @@ class Application < Rails::Application
     config.asset_sources = AssetSources.new(
       manifest_path: Rails.public_path.join('packs', 'manifest.json'),
       cache_manifest: Rails.env.production? || Rails.env.test?,
-      i18n_locales: Idp::Constants::AVAILABLE_LOCALES,
+      i18n_locales: IdentityConfig.store.available_locales,
     )
 
     console do
@@ -113,7 +113,7 @@ class Application < Rails::Application
     config.time_zone = 'UTC'
 
     config.i18n.load_path += Dir[Rails.root.join('config', 'locales', '**', '*.{yml}')]
-    config.i18n.available_locales = Idp::Constants::AVAILABLE_LOCALES
+    config.i18n.available_locales = IdentityConfig.store.available_locales
     config.i18n.default_locale = :en
     config.action_controller.per_form_csrf_tokens = true
 
diff --git a/config/application.yml.default b/config/application.yml.default
index 8c2cdf0de5f..4327fc3af62 100644
--- a/config/application.yml.default
+++ b/config/application.yml.default
@@ -23,6 +23,7 @@ aamva_verification_url: https://example.org:12345/verification/url
 all_redirect_uris_cache_duration_minutes: 2
 allowed_ialmax_providers: '[]'
 allowed_verified_within_providers: '[]'
+available_locales: 'en,es,fr'
 account_reset_token_valid_for_days: 1
 account_reset_fraud_user_wait_period_days:
 account_reset_wait_period_days: 1
diff --git a/config/initializers/rack_timeout.rb b/config/initializers/rack_timeout.rb
index 4c76e637430..201e24f311a 100644
--- a/config/initializers/rack_timeout.rb
+++ b/config/initializers/rack_timeout.rb
@@ -10,7 +10,7 @@ class Timeout
       '/verify/document_capture',
       '/verify/link_sent',
     ].flat_map do |path|
-      [path] + Idp::Constants::AVAILABLE_LOCALES.map { |locale| "/#{locale}#{path}" }
+      [path] + IdentityConfig.store.available_locales.map { |locale| "/#{locale}#{path}" }
     end + ['/api/verify/images']).freeze
 
     def call_with_excludes(env)
diff --git a/lib/identity_config.rb b/lib/identity_config.rb
index 9b4c2e42c00..841c6dd6e6f 100644
--- a/lib/identity_config.rb
+++ b/lib/identity_config.rb
@@ -136,6 +136,7 @@ def self.build_store(config_map)
     config.add(:async_wait_timeout_seconds, type: :integer)
     config.add(:attribute_encryption_key, type: :string)
     config.add(:attribute_encryption_key_queue, type: :json)
+    config.add(:available_locales, type: :comma_separated_string_list)
     config.add(:aws_http_retry_limit, type: :integer)
     config.add(:aws_http_retry_max_delay, type: :integer)
     config.add(:aws_http_timeout, type: :integer)
diff --git a/lib/idp/constants.rb b/lib/idp/constants.rb
index 7c56c623e06..2090c4b420b 100644
--- a/lib/idp/constants.rb
+++ b/lib/idp/constants.rb
@@ -2,7 +2,6 @@
 
 module Idp
   module Constants
-    AVAILABLE_LOCALES = %w[en es fr].freeze
     UUID_REGEX = /\A[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\z/
 
     KMS_LOG_FILENAME = 'kms.log'
diff --git a/lib/telephony/pinpoint/voice_sender.rb b/lib/telephony/pinpoint/voice_sender.rb
index 0a371936616..8cefe338429 100644
--- a/lib/telephony/pinpoint/voice_sender.rb
+++ b/lib/telephony/pinpoint/voice_sender.rb
@@ -5,6 +5,12 @@
 module Telephony
   module Pinpoint
     class VoiceSender
+      DEFAULT_VOICE_ID = ['en-US', 'Joey'].freeze
+      LANGUAGE_CODE_TO_VOICE_ID = {
+        en: DEFAULT_VOICE_ID,
+        fr: ['fr-FR', 'Mathieu'],
+        es: ['es-US', 'Miguel'],
+      }.freeze
       # One connection pool per config (aka per-region)
       # rubocop:disable Style/MutableConstant
       CLIENT_POOL = Hash.new do |h, voice_config|
@@ -98,16 +104,7 @@ def handle_pinpoint_error(err)
       end
 
       def language_code_and_voice_id
-        case I18n.locale.to_sym
-        when :en
-          ['en-US', 'Joey']
-        when :fr
-          ['fr-FR', 'Mathieu']
-        when :es
-          ['es-US', 'Miguel']
-        else
-          ['en-US', 'Joey']
-        end
+        LANGUAGE_CODE_TO_VOICE_ID.fetch(I18n.locale.to_sym, DEFAULT_VOICE_ID)
       end
     end
   end
diff --git a/spec/lib/telephony/pinpoint/voice_sender_spec.rb b/spec/lib/telephony/pinpoint/voice_sender_spec.rb
index d0961f64296..f82bfc378cd 100644
--- a/spec/lib/telephony/pinpoint/voice_sender_spec.rb
+++ b/spec/lib/telephony/pinpoint/voice_sender_spec.rb
@@ -26,6 +26,13 @@ def mock_build_clients(client: pinpoint_client, backup_client: backup_pinpoint_c
     )
   end
 
+  describe 'LANGUAGE_CODE_TO_VOICE_ID' do
+    it 'contains a key for every available locale' do
+      expect(
+        Telephony::Pinpoint::VoiceSender::LANGUAGE_CODE_TO_VOICE_ID.keys.sort,
+      ).to eq I18n.available_locales.sort
+    end
+  end
   describe '#deliver' do
     let(:pinpoint_response) do
       double(message_id: 'fake-message-id')