Ban ñ from Spanish! My language does not have this character!
Non-native speakers tend to mess up dental fricatives in speech as is. This usage is a good reminder as a character for a sound your language doesn’t have… a lot of languages “th” is pronounced as English “t” which implies aspiration like in Thomas. It is just like learning any other non-Romantic language & is literally in Icelandic—not some made-up character.