Problem with German "Umlaute" and Acronyms

Hello,

when replacing text with acronyms german "Umalute" (ä,ö,ü) seem to be treated as whitespace.

When i have an acronym

'abc'=>'ABCDEFG'

then in the word

äabc

abc is replaced, tough it is just part of a word.

How can I fix this?

Kind regards,
nocte

P.S. i suppose there's the same issue with "Scharfes s" (ß).

Acronym replacements only support English characters