We use Weblate to translate.
You can still edit these files manually though. If you decide to do so, in order to avoid merge conflicts it's best to base your work on the latest changes, from the Weblate git remote (https://hosted.weblate.org/git/jump-cutter/extension-ui/), translations
branch.
WofWca/jumpcutter-translations
Go to https://github.com/WofWca/jumpcutter. This is for tracking purposes only, just so that people's contributions are displayed on their profiles, because they're not recognized inside non-default branches. Though you still have to star or fork this repo (see https://docs.github.com/en/account-and-profile/setting-up-and-managing-your-github-profile/managing-contribution-graphs-on-your-profile/why-are-my-contributions-not-showing-up-on-my-profile#commits)
NOASSERTION