The Tonga language of Mozambique, or Gitonga (spelled Guitonga in Portuguese) is a Bantu language spoken along the southern coast of the country. Often thought to be closest to Chopi to its south, the two languages have only a 44% lexical similarity.

• Christian hymns, together with some of the Psalms of David in the language of the Ba Tonga, as spoken in the district of Inhambane, east Africa (1901)
• Ruthe. Samuele: Ruth, and I. Samuel, chapters I to IV, in the Gitonga language (1902)
• Itestamente lipya nya pfumu yatu Jesu Kristu: kanga ku lobidwego ki gitonga (1905)