I was recently wondering about the Danish Alphabet and how those extra letters, ØÅÆ, fit into their alphabet. So I did a quick search, and found out that they are just pinned on the end of our English alphabet like so.
But please note, Wikipedia says:
The letters c, q, w, x and z are not used in the spelling of indigenous words.
in a way, it's similar to finnish. however, finnish does not have certain letters in their alphabet, such as "b". it also has a rule that words cannot start with certain letters (i think it's like "f" or "g" and some more, i can't remember) but their extra letters, ä, å and ö are just stuck onto the end of their alphabet as well.
Did you also know that italian alphabet has only 21 letters ? The J, K, W, X and Y cannot be found in indigenous words as well.
But then - like other languages - we have many words of foreign origin. Eg: cykel, cacao, camping, cd, cement (not used for glue), chance, chauffør... interview, show, wc, wienerbrød (Vienna-bread = danish pastry), wire, wok... xylofon, bordeaux (for the color), fax, index, jaloux, sex... zebra, zink, zoo, zoom, bliz, quiz, trapez...