language change

Hello, good afternoon. I've been looking into it and I can't figure out how to change the language of FS PBX. Is it possible? Has anyone managed to change the language? So far, I've only been able to change the menu title language, but the content is still in English. Thank you very much.

When I go to Advanced > Default Settings and make a change then click RELOAD, the language on the screen changes from english to what appears to be arabic. Has anyone seen this? I can't find a cause. All the settings pertaining to language appear to be set on english See attached before and...