Twi is a collection of dialects of the Akan language, spoken in Ghana.

Twi (pronounced ) or Asante Twi, is spoken by over 9 million ethnic Asante people as a first language and second language. Twi (or Asante Twi) is a common name for two former literary dialects of the Akan language, Asante (Ashanti) and Akuapem, which are mutually intelligible. There are about 9 million Twi speakers, mainly in Ashanti Region, Ghana. Akuapem Twi was the first Akan dialect to be used for Bible translation, and became the prestige dialect as a result.

Numeral or number prefixes are prefixes derived from numerals or occasionally other numbers. In English and other European languages, they are used to coin numerous series of words, such as unicycle – bicycle – tricycle, dyad – triad – decade, biped – quadruped, September – October – November – December, decimal – hexadecimal, sexagenarian – octogenarian, centipede – millipede, etc. There are two principal systems, taken from Latin and Greek, each with several subsystems; in addition, Sanskrit occupies a marginal position. There is also an international set of metric prefixes, which are used in the metric system, and which for the most part are either distorted from the forms below or not based on actual number words.