I think a language selector implementation would be better.
For example: as a student, I am trying to understand a concept in a document but I need it in the language I am learning. Should I change the language of the whole interface? I'm not sure... I may get stuck.
Another example: I'm trying to summarize a document to a foreign friend via Zoom or in person, I can simply switch the output language of the summarizer temporarily.
What do you think about this?