FIX: Do not override existing translations.

lib/i18n/backend/discourse_i18n.rb

@@ -70,7 +70,7 @@ module I18n
           if options[:overrides] && existing_translations
             if options[:count]
 
-              existing_translations =
+              remapped_translations =
                 if existing_translations.is_a?(Hash)
                   Hash[existing_translations.map { |k, v| ["#{key}.#{k}", v] }]
                 elsif existing_translations.is_a?(String)
@@ -79,7 +79,7 @@ module I18n
 
               result = {}
 
-              existing_translations.merge(options[:overrides]).each do |k, v|
+              remapped_translations.merge(options[:overrides]).each do |k, v|
                 result[k.split('.').last.to_sym] = v if k != key && k.start_with?(key.to_s)
               end
               return result if result.size > 0

spec/components/discourse_i18n_spec.rb

@@ -111,6 +111,13 @@ describe I18n::Backend::DiscourseI18n do
       expect(I18n.translate('wat', count: 123)).to eq('goodbye 123')
     end
 
+    it 'ignores interpolation named count if it is not applicable' do
+      TranslationOverride.upsert!('en', 'test', 'goodbye')
+      I18n.backend.store_translations(:en, test: 'foo')
+      I18n.backend.store_translations(:en, wat: 'bar')
+      expect(I18n.translate('wat', count: 1)).to eq('bar')
+    end
+
     it 'supports one and other' do
       TranslationOverride.upsert!('en', 'items.one', 'one fish')
       TranslationOverride.upsert!('en', 'items.other', '%{count} fishies')