[John.Smith]

So, it was my fault. Sorry for that.
The zip file contain in the translation folder a mapchooser_fr.zip.
I thought it has to be replaced with the original mapchooser_extended.phrases in the fr folder. The error lines in my first post are the result from this replacement.
Now im using the original mapchooser_extended.phrases.txt for fr and the erros are gone.
But:

Now there are these Erros ;-)

L 05/16/2011 - 23:22:14: -------- Mapchange to de_dust --------
L 05/16/2011 - 23:22:14: [SM] Fatal error encountered parsing translation file "fr/mapchooser_extended.phrases.txt"
L 05/16/2011 - 23:22:14: [SM] Error (line 19, column 82): Line contained too many invalid tokens

but im sure now that your plugin is perfectly installed ;-)

Is there a chance to fix this error message ?

lg
Smith