Thanks @smarcil for sharing your process and solutions! Glad to hear the translations are working well on your system.
@brendenpicard @Fcabada Be sure to check that the locale is installed on your server. There are extra steps to follow for Windows servers, it’s unfortunate to see that the community-created video is no longer available 
however the steps are luckily still there, and here’s a link to the original thread, hope it helps: Translate Gibbon into another language in a Windows environment