Usted buscó: double byte characters (Inglés - Turco)

double-byte characters
çift baytlık karakterler

double byte
Çift bayt

double-byte coded font
çift baytla kodlanmış yazı tipi

double-byte character-set (dbcs)
çift baytlık karakter takımı

multi-byte character codes are used to express many characters for many languages. mbstring is developed to handle japanese characters.
multi-byte string functions

a multi-byte character encoding represents single character with consecutive bytes.
introduction