It won't run when there are more than 5 non-ascii characters. 4 characters are fine though.

I tried with Ren'py version 6.16.5 since its release history mentioned it can run in non-ASCII directories and it works perfectly fine no matter how long they are.
I used "テストですけど" for the running test purpose.
I'd appreciate if you look into this problem.
Thanks in advance.
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Ren'py version 6.99.4 and 6.16.5
OS Windows 7 64bit