The main forum table shows only the original language even though there are translations

Forum is approved for removal. See #1898812: [policy] Deprecate forum module for removal in Drupal 11 →

This is now Postponed. The status is set according to two policies. The Remove a core extension and move it to a contributed project → and the Extensions approved for removal → policies.

It will be moved to the contributed extension → once the Drupal 11 branch is open.

This patch should solve the problem.
There might be more underlying issues to solve but it will get the translated titles to be displayed.

Moved to Forum project, as the issue still exists!

Created a MR based on #10 for the forum module. Please review.

Patch #10 btw. doesn't apply any more against 10.3.x / 11.x - so here's a rerolled patch against 10.3.x

Patch #15 aka MR works fine and fixes the forum translation as expected

Just tried the patch #15 (Reroll of #10) with 10.3.x and 10.2.5 and it works as expected! Forum is now shown translated! :)

Code looks good, would be good to add tests for this as it feels like important functionality

Forum breadcrumbs still contain untranslated text (from Taxonomy terms).

I didn't find any other issues yet.