Analyzer to every n characters

I currently have an analyzer using the regular expression \\W|_. This splits by non-word chars and underscore. How will this handle other special characters from other languages?

Furthermore, is there a way to configure the regular expression in the analyzer to split every x characters? If the criteria is not met to split the expression, I'd like to split it after x characters regardless of what character it is. Is this feasible?

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