Hello root,
the issue is not caused by EW itself. The example uses a font Segoe UI which does not contain support for Chinese, Korean, etc.
With version 12 we have added verification to detect and eliminate glyphs which are not available in the font. In version 11, the verification was not existing resulting in Windows selecting by itself the glyphs from another font to satisfy the text rendering.
Please modify the String Table example so that it uses a font with support for Chinese and Korean languages. We will fix the example with next update.
Best regards
Paul Banach