By the way, I guess you already know that alt="" attributes of [[!img
tags should also be translated.
I'm saying this because in
doc/encryption_and_privacy/gpgapplet/public-key_cryptography.fr.po, line
with "gpgapplet_with_seal.png" you removed the English from the msgstr
(that's good) but you didn't put any French. That's just untranslated
for the moment, which is perfectly fine as well :)