Can a community edition build include a patch

Hi,

There's a feature that Thai users really needed - dictionary-based
word breaker - https://bugzilla.mozilla.org/show_bug.cgi?id=7969
But it's not included in the main distribution. We have to rebuild
Mozilla/Firefox/Thunderbird with the (220 lines) patch on
Linux/Windows/Mac to make it usable for Thai.

But how about the trademarks?  The Linux (Fedora/Ubuntu) binaries
include many patches (I guess) and still are called 
Mozilla/Firefox/Thunderbird.
On Windows, however, we can't just call it Mozilla/Firefox/Thunderbird
because of the trademark issue.
Can we call it, e.g. Thai Firefox Community Edition.
Does the name allow applying patch to the build?

Regards,
Samphan Raruenrom.