From the 7.3 release onwards, the community-based UI localization system (Babili) has been decommissioned.
All localization of Talend products is now handled internally by Talend. This means that the scope of languages available in the products will be restricted to French, Japanese and (partially) Chinese so that Talend can maintain and support them over time.
For the 7.3 release itself, all community languages and their partial translations are still available. Talend reserves the right to remove these languages in subsequent releases.