I am more surprised by the description of “rock döts”. A Norwegian certainly knows that ASCII is not enough for all our alphabetical needs.

https://en.wikipedia.org/wiki/Metal_umlaut

The writer presumably knows that umlauts and other non-ascii characters are functional in many languages. "rock döts" is poking fun at the trend in a certain tranche of anglophone rock/metal to use them in a purely aesthetic way in band names etc.