Provide .mo and .json files for translations

[frenzymadness]

As you can see in notebook/notebook/i18n/ only the nl translation provides also generated .mo files and nbjs.json files. I've checked the wheel file provided on PyPI and the content is the same. Is that intended? I mean, AFAIU, the .po files are useless without the generated .mo files, right?

Would it be possible to regenerate all the .po files into .mo files and nbjs.po to nbjs.json?

[RRosio]

Thank you for reporting this issue @frenzymadness. Just noting here, as @krassowski mentioned in Triage, that Notebook 7 will use Jupyterlab machinery, https://github.com/jupyterlab/jupyterlab-translate and https://github.com/jupyterlab/language-packs, for translations. If you would like to provide feedback on these translations that would be appreciated!

[frenzymadness]

The standalone language packs look very good and the whole process of their release is very promising. Good job.

Would it be accepted for version 6.5 if I open a PR with pre-generated .mo and .json files to fix it before we'll be able to switch to version 7?

My motivation for this is that I'd like to update notebook in Fedora Linux to version 6.5 and I'm able to generate the .mo files during the build of RPM packages but I'm not able to generate the .json files because the JS implementation of po2json from npm is not available in Fedora.

[jtpio]

Closing as fixed by #6728, thanks!