The letters В, Ё (since 1957), Ф, Х, Ц, Ч, Щ, Ъ, Ь and Э are not used in native Kazakh words. Of these, Ё, Ц, Ч, Щ, Ъ, Ь, Э, are used only in words borrowed from Russian or through the Russian language which are written according to Russian orthographic rules. The letter Х in conversational speech is pronounced similar to Қ. The letter Һ is used only in Arabic-Persian borrowings and is often pronounced like an unvoiced Х (as , or a voiceless glottal fricative).