Fix locale packs loading in embed layout

app/views/layouts/embedded.html.haml

@@ -5,7 +5,11 @@
     %meta{ name: 'robots', content: 'noindex' }/
 
     = javascript_pack_tag "locales", integrity: true, crossorigin: 'anonymous'
-    = javascript_pack_tag "locale_#{I18n.locale}", integrity: true, crossorigin: 'anonymous'
+    - if @theme
+      - if @theme[:supported_locales].include? I18n.locale.to_s
+        = javascript_pack_tag "locales/#{@theme[:flavour]}/#{I18n.locale}", integrity: true, crossorigin: 'anonymous'
+      - elsif @theme[:supported_locales].include? 'en'
+        = javascript_pack_tag "locales/#{@theme[:flavour]}/en", integrity: true, crossorigin: 'anonymous'
     = render partial: 'layouts/theme', object: @core
     = render partial: 'layouts/theme', object: @theme
     = yield