Hi everybody!

I wanted to make a question, let's see if somebody knows something about it. I need to upload a video with multiple language subtitles in Facebook, where the viewer can choose in which language are the subtitles displayed. The video and the different .srt subtitles files are correctly uploaded, but it still doesn't work. I can not find information about it in the Facebook specs or online... does somebody know if this is possible to do?

Many thanks in advance!
Elia