FIX: Translation overrides were not cached by locale properly.

lib/freedom_patches/translate_accelerator.rb

@@ -104,10 +104,9 @@ module I18n
       site = RailsMultisite::ConnectionManagement.current_db
 
       by_site = @overrides_by_site[site]
+      by_site ||= {}
 
-      if by_site.nil? || !by_site.has_key?(locale)
-        by_site = @overrides_by_site[site] = {}
-
+      if !by_site.has_key?(locale)
         # Load overrides
         translations_overrides = TranslationOverride.where(locale: locale).pluck(:translation_key, :value, :compiled_js)
 
@@ -119,6 +118,8 @@ module I18n
             by_locale[tuple[0]] = tuple[2] || tuple[1]
           end
         end
+
+        @overrides_by_site[site] = by_site
       end
 
       by_site[locale].with_indifferent_access

spec/components/freedom_patches/translate_accelerator_spec.rb

@@ -14,4 +14,22 @@ describe "translate accelerator" do
     expect(I18n.t(key.to_sym)).to eq(text_overriden)
   end
 
+  describe '.overrides_by_locale' do
+    it 'should cache overrides for each locale' do
+      TranslationOverride.upsert!('en', 'got', "summer")
+      TranslationOverride.upsert!('zh_TW', 'got', "冬季")
+      I18n.backend.store_translations(:en, got: 'winter')
+
+      I18n.overrides_by_locale('en')
+      I18n.overrides_by_locale('zh_TW')
+
+      expect(I18n.instance_variable_get(:@overrides_by_site)).to eq(
+        "default" => {
+          "en" => { "got" => "summer" },
+          "zh_TW" => { "got" => "冬季" }
+        }
+      )
+    end
+  end
+
 end