Hi Adri
In WPML String Translation you can add it manually with the key name tab_label_recent
Example
Domain: admin_texts_theme_mods_trusted-pro
Key name: [theme_mods_trusted-pro]tab_label_recent
In case you need to translate the other tabs, the full list is:
- tab_label_recent
- tab_label_featured
- tab_label_sale
- tab_label_best
- tab_label_rated
Hope this helps.