It seems to be a huge bug, because lots of people have this issue and no real solution can be found. I don’t want to give up BP, so I have my website running with this problem in translation.
If you find something, please share here. I’ll certainly do the same.
I’m pretty sure that this fil is being read and that the language file is being found because of the flag that I put: “FOUND IT!!”. In fact everything is being translated but the titles! No title got the proper translation, like: