Polish, like most European languages including English, is based on the Latin alphabet. To represent additional sounds, some of the letters get modified to create new letters. The new letters pretty much look like their unmodified forms. In Polish, these additional letters are: ąćęłńóśźż. How does one alphabetize the new letters? The Polish alphabetization rule (also called a collation) is to place the new letters after the unmodified form. So the Polish alphabetical order is: aąbcćdeęfghijklłmnńoóprsśtuwyzźż.