I'm discovering etm, it looks great!
I'm a french guy Ubuntu 10.04, with LANG=fr_FR.utf8.
I have to do a "export LC_ALL=en_US.utf8", in order to solve bugs (events created on pm are recorded on am).
Installed locales can be listed with "locale -a".
I didn't see any unittest in the source code, it should be useful for this kind of bugs.