BuddyPress.org

Thank you both for pointing me in the right direction. But I still got some problems.

I tried the language translation files but it only translates a few parts of the actual content inside BuddyPress and not any of the URLs.

So I tried to follow the steps in the Docs. But I seem to be missing a bp-custom.php file. So I added the definable slugs to my wp-config.php file instead. But no change has been made to my URLs.

What could be wrong?