BuddyPress.org

1) https://codex.buddypress.org/how-to-guides/customizing-labels-messages-and-urls/

2) Go to your wp-admin area, in the BuddyPress menu go to “Component Setup”. This lets you disable/enable each component of BuddyPress. If you disable, they are removed from menus. If you want the component active but not on your menu, you will need to create a child theme: https://codex.buddypress.org/how-to-guides/building-a-buddypress-child-theme/