Allowing characters in eg variable names in Monaco editor

Is there a Monaco option to treat non-ascii characters as valid in variable names in the Monaco editor? In VSCode the below code would have been formatted as a valid variable name, but when using MonacoEditor it stumbles on valid characters like รถ.

I have tried toggling the unicodeHighlight: nonBasicASCII option, but that seems to be something else, and neither does unicodeHighlight: allowedLocales do any good here. The red color has the classname .mtk11, but I haven’t been able to find a list of what those classnames actually mean.

enter image description here

I’m using [email protected] (in a Nuxt4 project through [email protected], but options are forwardes as-is, so that probably doesn’t matter.)