Hello, @asmecher
Sorry about the tag/branch confusion. Yep, branch is there. Checked it out and synced all submodules to it. So I should just stick with this while no 3.1.2 or 3.2.x is available. Great.
And yes, now translation is working. Will not update the Portuguese locales.
Meanwhile, if you could give a look into this other ticket, it would be great: OJS3 email empty at some cases - #8 by ambs
I suppose it is locale-related as well.
Thank you!!