Ticuna, Tikuna, Tucuna or Tukuna is a language spoken by approximately 50,000 people in the Amazon Basin, including the countries of Brazil, Peru, and Colombia.

[2][3] 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.

[4] Despite being home to more than 50% of the Ticunas, Brazil has only recently started to invest in native language education.

A large-scale project has been recording traditional narrations and writing them down to provide the literate Ticunas with some literature to practice with.

[6] Besides its use at the Ticuna schools, the language has a dozen books published every year, both in Brazil and Peru.

Glottal stop is spelled x, and the sixth vowel ü. Typologically, Ticuna word order is subject–verb–object (SVO), though unusually this can vary within the language.

Research has indicated isolated tonal languages with complex tones are more likely to occur in regions of higher humidity and higher mean average temperature because it is believed the vocal folds can produce less consistent tones in colder, drier air.

[8] Some have tentatively associated the Ticuna language within the proposals of the macro-arawakano or with macro-tukano stocks, although these classifications are highly speculative given the lack of evidence.

Ticuna displays nominative/accusative alignment, with person, number, noun class, and clause type indexed on the verb via proclitics.