Timed Text is not working on non-English Wikipedias.
Steps to reproduce:
1.) Go to https://sv.wikipedia.org/wiki/Du_gamla,_du_fria or https://ko.wikipedia.org/wiki/%EC%8A%A4%EC%9B%A8%EB%8D%B4%EC%9D%98_%EA%B5%AD%EA%B0%80#%EC%8A%A4%EC%9B%A8%EB%8D%B4%EC%96%B4_%EA%B0%80%EC%82%AC
2.) Play the file "File:United States Navy Band - Sweden.ogg" using the browser media player.
3.) Note there's no text showing up when that file has timed text in the respective languages. Purging the page's cache did not resolve the issue.
This may be related to T224258