Рейтинг 4 из 5 звёзд

I don't see any way to submit bug reports :)

Great addon, making live a much easier. But stopped working. Current TB 102.2.2 (64-bit) on Ubuntu - has new edit contact form. Since that change, when I add custom 4 field with language it does not change language based on To field.
For contacts saved with older version edit form - dictionary is changed. When I re-save old contact with the same custom 4 field value - it stop changing dictionary.

Это отзыв для предыдущей версии этого дополнения (2.2.0). 

Рейтинг 5 из 5 звёзд

Very useful add-on. The only shortcoming for me is that it doesn't work with reply.

Это отзыв для предыдущей версии этого дополнения (2.0.5). 

Рейтинг 4 из 5 звёзд

Should be integrated in Thunderbird.
If you want to use it, I think the default language of Thunderbird should be English, since the field to modify ("custom 4", in the "other" tab) is in English... :-(

Это отзыв для предыдущей версии этого дополнения (2.0.2). 

"Should be integrated into Thunderbird", right, did you read the description of the add-on?
Note that one day in the future Thunderbird will absorb this add-on, since there is an enhancement request for it:
https://bugzilla.mozilla.org/show_bug.cgi?id=1020181