Carlos, i'm afriad the Character Sets don't work. Atleast not in any reasonably useful fashion.
God knows how they have been created, but they just don't work.
I've tried to get several languages (Russian, Japanese, and Korean) working with limited success.
Not sure if it is a case of how DBP handles strings or if it is a case of poorly implimented Character Sets functionality.
Really, considering most of Dark Basic Professionals clients use Windows XP which uses Unicode exclusively there is no reason to be using the old Character Sets. Infact what disappoints me even further is that the IDE itself can't handle Unicode characters either.
In my opinion this is a very bad practise considering it really forces non-latin based people to either conform to an English letter set or miss out.
Eitherway, it means if you want to have a Multi-Lingual game you'll have to code your own translation system (which is a pain in the backside!)