Zimbabwe has many languages. You would need to be more specific. Here is a list of options:
Dombe
English
Fanagalo
Kalanga
Kunda
Lozi
Manyika
Nambya
Ndau
Ndebele
Nsenga
Nyanja
Shona
Tonga
Tsoa
Tsonga
Tswa
Tswana
Venda
Who did great Zimbabwe trade with?
Predominantly all the merchants travelling along the mozambiquen cost on the Indian ocean on their way to India. There was gold,iron,game,ivory and various craftsmanship fro the West and East to tap from. Religiously the effects of Great Zimbabwes spirituality affected all the way to Egypt;-see the sun symbols in relation to the bird in Egyptian and East
Archaeological evidence suggests that Great Zimbabwe became a center for trading, with a trade network linked to Kilwa Kisiwani and extending as far as China. This international trade was mainly in gold and ivory. The rulers of Zimbabwe brought artistic and stone masonry traditions from Mapungubwe.