Translate first post dropdown menu items ‘Close’ and ‘Open’

Hello,

how can we translate the dropdown menu items ‘Close’ and ‘Open’ on the three point menu on the right side of the first post in a topic?

We tried to translate them via Settings > bbPress Style Pack > Translations and also via PoEdit (we created bbp-style-pack-de_DE.po and bbp-style-pack-de_DE.mo files with the bb-style-pacl-pot in /wp-content/plugins/bbp-style-pack/languages and copied them to /wp-content/languages/plugins).

The two strings are still not translated in the frontend.

Best regards