Hello, Helena!
Welcome to the community!
The language that is used in Trello is based on your profile settings. Therefore, two different users could see the board settings/Trello text in two different languages. The content of the board will be in whichever language you enter the text, and you can adjust this at any time, however, this won't be able to be localized.
Kind regards,
Alisson
Trello team
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.