It's because English sentences are made up of words, and words often have more than one syllable.
Leswi swi vangiwa hileswi ririmi leri ri nga ni marito lamantshwa lama nga siva lawaya ya khale, naswona marito yo tala lawa ma ha tirhisiwaka ma ni tinhlamuselo to hambana ni leti a ti tirhisiwa khale.