Tsoa, Tshwa or Tshuwau, also known as Kua and Hiechware, is an East Kalahari Khoe dialect cluster spoken by several thousand people in Botswana and Zimbabwe.

One of the dialects is Tjwao (formerly spelled 'Tshwao'), the only Khoisan language in Zimbabwe, where "Koisan" is a language officially recognised in the constitution.

Tsoa–Kua is a dialect cluster, which is still poorly studied but seems to include:

The following inventory is of the Kua dialect:

The Cire-cire (not cited) dialect has the following consonant inventory:

The clicks have a very uneven distribution: Only a dozen words begin with one of the palatal clicks (ǂ), and these are replaced by dental clicks (ǀ) among younger speakers. Only half a dozen words start with one of the alveolar clicks (ǃ), and half a dozen more with one of the affricated clicks. These rather marginal sounds are placed in parentheses in the chart.

Tsoa has the five vowels /a e i o u/, and three nasal vowels /ĩ ã ũ/. It is not clear if Tsoa has long vowels, or simply sequences of identical vowels /aa ee ii oo uu/.

There are two tones, high and low, plus a few cases of mid tone.