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