BuddyPress.org

@lunarayven You can check following codes and use them with Snippet plugin

Change “Activity” component’s name and slug to something else.

Other references of “activity” string at the frontend can be translated using Loco Translate

@lunarayven BP does not offer login page, you can use any 3rd party plugin like login with Ajax to create a login page.

@lunarayven Register page should work after page mapping. Try to save your site permalinks again from Setting >> Permalinks.
To debug the issue, try to deactivate other BP-related plugin and keep BuddyPress plugin active