I had some problems with translating FCKEditor into Danish, but then I looked at the documentation more time and saw that you had to save the lang. file in utf-8 format and not use utf-8 charaters in the lang. file.
I found this link that help me alot(how to encode your file into UTF-8 format):
http://www.w3.org/International/questio ... tions.html
Btw. if anybody is interested in the Danish lang. file you can email me at email@example.com until fred is launching a new version with it in.
UTF-8 translate lang. in FCKEditor