The fonts for the listed Indic, Afrikaans and CJK languages are hard-coded and cannot be changed by the user:
Bengali: Bangla
Malayalam: Kartika
Telugu: Gautami
Kannada: Tunga
Tamil: Latha
Afrikaans: Arial
Afrikaans (South Africa): Arial
Chinese: SimSun
Chinese (Taiwan): PMingLiU
Chinese (China): SimSun
Thai: Tahoma
Thai (Thailand): Tahoma
Hebrew: Arial
Hebrew (Israel): Arial
Vietnamese: Arial
Vietnamese (Vietnam): Arial
Japanese: MS Gothic UI
Japanese (Japan): MS Gothic UI
Korean: Batang