diff --git a/app/controllers/concerns/localized.rb b/app/controllers/concerns/localized.rb
index 145549bcd..cefd374e7 100644
--- a/app/controllers/concerns/localized.rb
+++ b/app/controllers/concerns/localized.rb
@@ -20,7 +20,12 @@ module Localized
     if ENV['DEFAULT_LOCALE'].present?
       I18n.default_locale
     else
-      request_locale || I18n.default_locale
+      case request_locale
+      when /en\b/, nil
+        I18n.default_locale
+      else
+        request_locale
+      end
     end
   end