Swedish language
There are three characters in the Swedish language that are not used in English. These are å, ä and ö.  The letter å is a vowel sound between [a] and [o], similar to the English word awe.  The letter ä is a vowel sound similar to [ɛ], like in the English word bed.  The letter ö is a vowel sound between [o] and [ɛ], pronounced [øː] like the u in the English word burn.  These characters are also used in the Finnish language, while Norwegian and Danish languages replace ä and ö with similar characters æ and ø.