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.
Maletere ya matiko mambe. Maletere ma fanele ma tirha hi ririmi leri vulavuriwaka. Hi xikombiso, “ж” i letere leri nga kona eka maletere ya Xirhaxiya kambe a ri si tshama ri tirhisiwa eka Xinghezi naswona hikwalaho a ri fanelanga ri humelela eka tsalwa rihi na rihi ra xihlovo ra Xinghezi.