Capital N in incantations

[Koen G]

especially if not writing in one's native tongue

That's fine, but then you are resorting to the "bad German" argument. In that case it becomes hard to single out one meaning though, since it opens wide the gates for all kinds of ungrammatical interpretations.

Note that I use "grammar" in the actual meaning: "the set of structural rules governing the composition of clauses, phrases and words in a natural language", not in the popular English meaning of "spelling". Grammatical rules are known intuitively by adult native speakers. Spelling rules are a post-medieval construct.