I was thinking more of the spelling, as most languages don't have a sound like the English -th-, and when they do, it gets represented by different letters.
Do you know about Vietnamese sounds, Chrisell? They certainly have -th- appearing in their spelling system, but I don't know how they pronounce it (plus, they were a French colony for a while and it's a sound that gives the French enormous difficulty). And indigenous South African languages can be very confusing because they have a voiced and an unvoiced t, represented as t and th but not pronounced like the English th - so
Thabo Mbeki's first name sounds like TAH-boh.
It'd also be helpful to know where the labelled lady originated from!