I'm looking for something similar to Notion for my company's internal documentation (including operations), but it needs to be internationalized (and Notion isn't).

I've found out about Joplin[1] and thought it was the answer, but it seems that I cannot easily share the notes with my team in a collaborative manner. A pity! The quest continues.

[1]https://joplinapp.org/

For small collaborative work CodiMD is great

https://github.com/hackmdio/codimd