I found the reason.
My lang files were ok, it was the "Do typographical replacements" option. Weird as in the previous version (as far as I remember) this was ok.
So I disabled "Do typographical replacements", but I was annoyed because I need some entities replacements.
In the
docs, it is said that entities are on/off according to this option, but it seems that I have my replacements even if "Do typographical replacements" is off. No annoyance then...
Well, nevermind, everything is nice now, thanks!