Thunderbird is displayed in English despite different system language

Thunderbird is always displayed in English (e.g. German or French Tails Desktop will result in it being launched in English language)

(19:06:21) intrigeri: iirc that was a known issue with the version of Thunderbird we've packaged. and I think it's fixed in the latest package in Debian.

Related issues

Related to #16113 (closed)
Blocked by #15959 (closed)

Original created by @spriver on 15942 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information