You can override all these from your backend language override section, you can refer on our documentation here how to override it from backend.
COM_EASYSOCIAL_PROFILE_GROUPS_PLURAL="%1$s Groups"
COM_EASYSOCIAL_PROFILE_GROUPS_SINGULAR="%1$s Group"
COM_EASYSOCIAL_PROFILE_EVENTS_PLURAL="%1$s Events"
COM_EASYSOCIAL_PROFILE_EVENTS_SINGULAR="%1$s Event"
COM_ES_ABOUT="About"
COM_ES_MORE="More"
COM_ES_SUBMIT_VERIFICATION="Request Verification"
COM_ES_SUBMIT_VERIFICATION_INFO="Once your account is marked as verified, a blue verified badge <i class='es-verified'></i> would appear on your profile and other sections on the site. This lets people know that your account is authentic and credible. This request is subject to approval from the site owners."
COM_ES_VERIFICATION_REQUEST_MESSAGE="Your Request"
COM_ES_VERIFICATION_MESSAGE_PLACEHOLDER="Why should the site admin verify your account?"
COM_ES_SEND_REQUEST="Send Request"
COM_ES_CANCEL="Cancel"
https://stackideas.com/docs/easysocial/administrators/languages/creating-language-overrides