@Fabrice,
Thanks for your help.
1) I took your cbpaidfrench.zip file that you attached (I seen you let french accent inside like I did at the beginning) and I installed your file on my test site.
But I seen again the same mistake that I discovered at the beginning of this story: some accents were replace by this strange character �.
I attached 2 screen shot files to show you (translation of "upgrade" was displayed by "Mettre � jour" instead of "Mettre à jour").
Did you obtain the same wrong behaviour on your side?
2) To avoid this strange character �, as explained in my 1st message, I decided to change all French accents by their HTML code.
Some sentences are correct, some others not like you can see on 2 screen shots below:
3) Currently, I do my test with some French sentences without any accent in order to avoid wrong display like you can see below:
It's the reason why I'm the feeling this issue is due to a CBsubs bug, except if somebody explain to me what to do to obtain all sentences correctly displayed with French accent.
At each time, I saved french.php with UTF8 encoded.
Regards,
vincimoz