Hawaiian language
One might think that learning the language would be relatively easy, but that only applies to na keiki (children) who have never learned the 26 letters that English speakers use. There is a children's rhyme that goes on for a couple of minutes (and written, probably a couple dozen lines) that consists of nothing but both versions of the letters a, i and the okina. It talks of him (ia) eating (ai) his (iaia) fish (ia).