FIX: allows to have custom emoji translation without static file (#9893)

app/serializers/site_serializer.rb

@@ -26,7 +26,8 @@ class SiteSerializer < ApplicationSerializer
     :topic_featured_link_allowed_category_ids,
     :user_themes,
     :censored_regexp,
-    :shared_drafts_category_id
+    :shared_drafts_category_id,
+    :custom_emoji_translation
   )
 
   has_many :categories, serializer: SiteCategorySerializer, embed: :objects
@@ -154,6 +155,10 @@ class SiteSerializer < ApplicationSerializer
     WordWatcher.word_matcher_regexp(:censor)&.source
   end
 
+  def custom_emoji_translation
+    Plugin::CustomEmoji.translations
+  end
+
   def shared_drafts_category_id
     SiteSetting.shared_drafts_category.to_i
   end