How to add a new language to Transifex's Open edX release?


this question is related to my previous one, but more oriented to practical issues, instead of why-like issues.

How to add a new language to a Transifex folder/project? Specifically, I’d like to add the Basque language .po files to the open-edx-releases project in Transifex I can see that Basque has a lot of files already translated in the edx-platform project but as mentioned, it is missing in open-edx-releases project. Who is responsible to add a new lang to a specific Transifex project? Thanks.