Clarification about translation process in Transifex


Using Juniper here. I’m aware about the translation process in Transifex. But after reading the related guide I still have a doubt about the process. Specifically, I can see two different set of translation files, one at “Open edX releases” and the other one at “edX Platform”. What’s the purpose of each one? I can see that Basque language translations are available in the “edX Platform” set (a lot of them) but not in the “edx Releases” set. Why is that? Thanks for the clarification.