User-Agent: Mozilla/5.0 (X11; U; Linux i686; es-ES; rv:1.7.11) Gecko/20050729 Build Identifier: Mozilla/5.0 (X11; U; Linux i686; es-ES; rv:1.7.11) Gecko/20050729 I don't know anybody using a localized build of thunderbird using the en-US dictionaries, so I suggest to remove them from localized builds, and they're smaller, too. Maybe if a localization team wants to keep them, an extra mechanism for this kind of exception should be provided. Reproducible: Always Steps to Reproduce:

http://lxr.mozilla.org/mozilla/source/mail/locales/Makefile.in#168 should be updated to remove en-US.dic and en-US.aff, I'm pretty sure. This bug shouldn't appear in the installers, just ZIP builds (unless I'm totally off base).

this sounds reasonble. Axel, will you be able to get a patch here today?

No, not at all.

personally, I think localizers should still have the possibility of keeping the English dictionaries, as in many countries English has become an important second language. In some countries we have localizations for, English is even a second official language for historical reasons. So we shouldn't remove them until we have a possibility to optionally add them into the installer et al.

Even in countries where English is an official, or unofficial, second language, you are assuming that it is the American dialect of English, and not regular English (en-GB). At the very least the American (en-US) dictionary needs to be removed for the English (en-GB) localisations. See bug #321742 for that specific case. And if you are going to include a dialect of English with non-English localisations, that one should either arguably be regular en-GB english, or selectable on a case by case basis, dependinging on whether (for example) they are former Commonwealth countries and use en-GB, or they are from somewhere where the "English" used is American. But either way including American in every build should certainly go in favour of something a bit more flexible.

AFAICT, neither Firefox nor Thunderbird ship the en-US dictionary in localized builds anymore.