The extended ranges contain mainly precomposed letters plus diacritics that are equivalently encoded with combining diacritics, as well as some ligatures and distinct letters, used for example in the orthographies of various African languages (including click symbols in Latin Extended-B) and the Vietnamese alphabet (Latin Extended Additional).
The extended character sets include precomposed letters with diacritical marks that are represented using combining diacritics, along with ligatures and unique characters used in alphabets like those of African languages (including click symbols in Latin Extended-B) and the Vietnamese alphabet (Latin Extended Additional).