Languages attested from the 1820s

Solresol (Solfège: Sol-Re-Sol), originally called (lit. 'Universal language') and then ('Universal musical language'), is a musical constructed language devised by French music teacher and composer Jean-François Sudre (1787–1862), beginning in 1817. His book defining it, , was published posthumously in 1866, though he had already been publicizing it for some years. Solresol enjoyed a brief spell of popularity in the latter half of the century and was sponsored by such figures as Victor Hugo, Alphonse de Lamartine, Alexander von Humboldt and Napoleon III, culminating with Boleslas Gajewski's pu

sign language used in Hawaii