Danish-speaking nations are listed here. Countries where the official language is Danish also includes republics with multiple official languages. List of countries, nations and states with an official language of Danish can be sorted by column. List of Danish-speaking countries are listed in alphabetical order.Where do they speak Danish? There are a number of countries that speak Danish. They're all on this list so don't be surprised to see a bunch of familiar names and nations on here. Danish may not be one of the world's most popular languages, for some countries, it is the language by which they communicate.