mozilla-thunderbird-l10n-en-US: mozilla-thunderbird-l10n-en-US (English (USA)) mozilla-thunderbird-l10n-en-US: mozilla-thunderbird-l10n-en-US: English (USA) language pack for thunderbird. mozilla-thunderbird-l10n-en-US: Use this package if you want to run mozilla thunderbird in your native mozilla-thunderbird-l10n-en-US: language (English (USA)). mozilla-thunderbird-l10n-en-US: mozilla-thunderbird-l10n-en-US: mozilla-thunderbird-l10n-en-US: mozilla-thunderbird-l10n-en-US: mozilla-thunderbird-l10n-en-US: mozilla-thunderbird-l10n-en-US: