Hi Stéphane:
Your post has two parts:
1) Regarding the proposed new logo (which does not look bad in my opinion): if the oldest is not badly broken, is it necessary to fix it?
2) Regarding the translation (something about it there:
https://www.mobileread.com/forums/sho...d.php?t=152849). I stopped using
Transifex because there were, time to time, security alerts about the site certificate: boring!
I have not been back there for a long time, but I made some additions through Qt Linguist which allows to deal with .qm format. In short, if my own French translation can help, let me know, I will send it to you (PM). However, it is incomplete for "Add Role" and some languages.
Cheers!