Instead of printing out the result, can you display it in a message box? I have a feeling you’re now running in to a display bug in the Windows console that’s been fixed for 7.6.6.
I do apologize for the issues you’ve had with non-English characters. We’ve been working hard on getting all of these tracked down and squashed. AFAIK, 7.6.5 will only have a couple Windows-specific issues (printing to the console and error messages in the GCU), which have been fixed for 7.6.6.