language swap?

Anyone have a fix for this?

I've been watching a lot of C-Dramas on tiktok.
Normally I have the auto sub (the little black box in the corner) turned off. As the pages I usually watch on have white text over the video (no text box. Just the font)

I was watching one last night, went to resume today and it's all in another language. Even the ones I watched last night,
Videos I have saved are also all suddenly in another language.

It's not tiktok translate box. How do I change it back? All the videos are still there in my watch history. Just now it's a different language.