Dear Karl,
It has always been preferred that you use english characters in scripts, but I don't know about such a restriction (especially since it is inevitable to have other characters in localized strings).
There have been restrictions added to GLOBALS and some other commands though. Is it possible your script errors come down to those? I would gladly look at one of your objects to verify what it might be, if you send it to me in a PM.
Regards,
Daniel Alexander Kovacs
Professional Services Consultant
GRAPHISOFT
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