Ticuna, or Tikuna, is a language spoken by approximately 40,000 people in Brazil, Peru, and Colombia. It is the native language of the Ticuna people. Ticuna is generally classified as a language isolate, but may be related to the extinct Yuri language. (See Tïcuna-Yuri.) It is a tonal language, and therefore the meaning of words with the same phonemes can vary greatly simply by changing the tone used to pronounce them.