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In page Tone (linguistics):

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Another difference between tonal languages is whether the tones apply independently to each syllable or to the word as a whole. In Cantonese, Thai, and Kru languages, each syllable may have a tone, whereas in Shanghainese,[citation needed] Swedish, Norwegian and many Bantu languages, the contour of each tone operates at the word level. That is, a trisyllabic word in a three-tone syllable-tone language has many more tonal possibilities (3 × 3 × 3 = 27) than a monosyllabic word (3), but there is no such difference in a word-tone language. For example, Shanghainese has two contrastive (phonemic) tones no matter how many syllables are in a word.[citation needed] Many languages described as having pitch accent are word-tone languages.