Lol, written vs spoken German is just as ambigious as any other language with too few letters in the alphabet. Just look at "ich" vs "ach" (and then of course there's dozens of local dialects that don't even have spelling rules and would need even bigger alphabets if "done right").
Source: Read it somewhere a long time ago, sorry.
Personally, I don't think the original misspelling merited any of this.
No indication that he is perusing medieval documents. Most likely Google/Gemini.