הוסף ממשק שפה חדש - אוזבקית

Looks like the translator plugin has an internal mapping for Google. This is a total hack, but you could try patching it by appending the following snippet to your plugin.rb.

after_initialize do
  if defined? DiscourseTranslator::Google::SUPPORTED_LANG_MAPPING
    DiscourseTranslator::Google::SUPPORTED_LANG_MAPPING[:uz] = "uz"
  end
end