Please don't use slashed O because then it is hard to distinguish the Norwegian/Danish character:
"Ø (or minuscule: ø) is a vowel and a letter used in the Danish, Norwegian, Faroese, and Southern Sami languages. It is mostly used as a representation of mid front rounded vowels, such as [ø] and [œ], except for Southern Sámi where it is used as an [oe] diphthong."
