Tonga may refer to five different languages:
- Tongan language, or Tonga (ISO 639-3:
ton
) – a Polynesian language spoken in Tonga in the South Pacific - Tonga language (Zambia and Zimbabwe), or Chitonga (ISO 639-3:
toi
) – a Bantu language spoken in Zambia, Zimbabwe and Mozambique - Tonga language (Malawi), or Chitonga (ISO 639-3:
tog
) – a Bantu language spoken in Malawi - Tonga language (Mozambique), or Gitonga (ISO 639-3:
toh
) – a Bantu language spoken in Mozambique - Ten'edn, also known as Tonga or Mos (ISO 639-3:
tnz
) – a Mon-Khmer language spoken in Thailand and Malaysia