I was browsing Mozdev.org today and seen this little XUL app, it seems to work really well with SMF, might be of some use, its pretty clean and nice.
http://phplangeditor.mozdev.org/
The only problem I seen with it is, it uses " instead of ' but a global replace could probably sort that.
http://img364.imageshack.us/img364/5462/tranlatorsmf5qe.png