Spanish alphabet
The letter combinations "CH", "LL" and "RR" used to be included as letters of the Spanish alphabet and sorted by themselves in dictionaries (but not "RR," since no Spanish words begin with "RR"), and thus the Spanish alphabet used to contain 30 letters until they were removed. They are no longer letters of the Spanish alphabet and are now just letter combinations with their own sounds. The letter K is limited in Spanish and mostly only occurs in foreign words borrowed from other languages. There are, however, some native Spanish words that do begin with the letter K (e.g. Kilo, Kilogramo, Kilómetro, etc.), and the letter W does not appear in original Spanish words, only in foreign words borrowed from other languages, and thus is hardly almost ever used in Spanish.