From Localization Lab Wiki
Enigmail is a Mozilla Thunderbird add-on that allows you to use OpenPGP to encrypt and digitally sign your emails and to decrypt and verify messages you receive.
Check which languages have full support in Thunderbird.
- Do not transcribe the app name. If it is necessary to transcribe for users in your language, please leave "Enigmail" in Latin letters followed by the transcribed name in parentheses.
- Ex: Briar (برایر)