This bug is still in Ubuntu 11.04 with Mozilla Firefox 4.01. According to https://bugzilla.mozilla.org/show_bug.cgi?id=631516 , it's an Ubuntu bug, not a Mozilla one.
** Bug watch added: Mozilla Bugzilla #631516 https://bugzilla.mozilla.org/show_bug.cgi?id=631516 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/651586 Title: Mozilla Thunderbird and Firefox spellcheck has too many languages -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
