You might have heard of Esperanto, an language that’s supposed to be internationally accessible. You probably haven’t heard of Solresol, a language entirely based on music. Its creator was an idealist, and hoped that he could unite all humankind with a universally accessible language built on something we all know: music. Solresol combines the do-re-me syllables used for teaching music into two-, three-, and four-syllable words, grouped into categories of similar words. Because there are only seven syllables, the language easily translates to hand signals.