史瓦济语（siSwati，[siswatʼi]）属于班图语支，在非洲南部的用户约300万，主要为斯威士兰和南非的史瓦济人。史瓦济语和英语同为斯威士兰的官方语言，也是南非的11种官方语言之一，在斯威士兰和南非普马兰加省（特别是原卡恩格瓦尼地区）的学校中教授。

史瓦济语的母语用户大多称本语言为Swati，但英语、西班牙语等语言中却称其为Swazi。史瓦济语与特克拉（Tekela）语支中的其他语言最为接近，但与尊达（Zunda）语支的祖鲁语、南恩德贝莱语、北恩德贝莱语和科萨语等语言也较接近。

The Swazi or Swati language (Swazi: siSwati [siswatʼi]) is a Bantu language of the Nguni group spoken in Swaziland and South Africa by the Swazi people. The number of speakers is estimated to be in the region of 3 million. The language is taught in Swaziland and some South African schools in Mpumalanga, particularly former KaNgwane areas. Swazi is an official language of Swaziland (along with English), and is also one of the eleven official languages of South Africa.