Danish is most closely related to Norwegian and Swedish. During the centuries that Denmark and Norway were one country, a dialect closer to Danish than Norwegian was spoken in the Norwegian cities. This is still in use today and is sometimes referred to as "Dano-Norwegian."
The Danish alphabet is the same as the Norwegian, consisting of the twenty-six letters of the English alphabet plus æ, ø, and å at the end. Before 1948 the å was written aa. The spelling reform of that year also abolished the German practice of beginning all nouns with a capital letter.
From:https://www.dbfei.com/Article/danmaiyu/201311/337.html