Comment to Where are the keys to translate?
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Did you translate the following?
1. _sys_ps_group_title_friends_selected - Selected friends
2. _sys_ps_group_title_relations - Relationships
3. _sys_ps_group_title_relations_selected - Selected Relationships...
For 'MEMBERSHIP LEVELS' you need to translate _sys_privacy_groups_aclIn general, you may type the text you want to translate directly in Studio -> Polyglot -> Keys -> Search field. Then check the provided keys and translate necessary of them. Of course, it may happen that you'll get a lot of keys in search results. :)