Foreign letters. Letters must be valid in the language being spoken. For example, “ж” is a letter in the Russian alphabet but is never used in English and so should never appear in any English source text.
Izinhlamvu zamagama ezingajwayelekile. Izinhlamvu zamagama kufanele zivumeleke olimini olukhulunywayo. Isibonelo, “ж” inhlamvu olimini lwesi-Russia kepha alisetshenziswa esiNgisini, ngakho-ke akufanelanga livele kumbhalo wesiNgisi.