A bubble chart sums up the observations nicely — [m], [i], [a], and [u] are shared among nearly all 21 languages, though in different combinations. A few other patterns exist, and no phone stands on its own.

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A bubble chart sums up the observations nicely — [m], [i], [a], and [u] are shared among nearly all 21 languages, though in different combinations. A few other patterns exist, and no phone stands on its own.