Text on User Research is not translatable

I am not sure why, but the content in the card 'Become a tester' at https://community.torproject.org/tr/user-research/ is not available for translation. The problem happens with the title, and also with the text: We regularly release Tor Browser early versions to allow users to test software improvements and new ideas. Sign up to be in our testing pool.

I looked a bit on the file (https://gitlab.torproject.org/tpo/web/community/-/tree/master/content/user-research/become-tester) but I could not find what was the problem. It seems different than the other content as it does not have a body.