#428

backend/app/services/tag_name_completion.rb

@@ -16,7 +16,8 @@ class TagNameCompletion
         locales.to_a.uniq(&:language_code).each do |locale|
           next if primary_names.key?(locale.language_code)
 
-          name = TagName.generate_name(locale, tag, primary_names['ja'])
+          source_language = locale.language_code == 'ja' ? 'ain' : 'ja'
+          name = TagName.generate_name(locale, tag, primary_names[source_language])
           primary_names[locale.language_code] = create_name!(locale, tag, name)
         end
         tag.association(:tag_names).reset
@@ -29,10 +30,10 @@ class TagNameCompletion
       persist_name!(locale, tag, name)
     rescue ActiveRecord::RecordNotUnique, ActiveRecord::RecordInvalid => error
       fallback = "Tag_##{ tag.id }"
-      collision =
+      invalid_name =
           error.is_a?(ActiveRecord::RecordNotUnique) ||
-          error.record.errors.of_kind?(:name, :taken)
-      raise if name == fallback || !(collision)
+          error.record.errors[:name].present?
+      raise if name == fallback || !(invalid_name)
 
       persist_name!(locale, tag, fallback)
     end