A sign language commonly used in Sweden.

Used to ask the interlocutor how many languages he or she speaks.

An association founded in 1924 to study the establishment of an international auxiliary language. In 1951, IALA presented Interlingua to the public by publishing the Interlingua-English Dictionary and Interlingua Grammar. Abbreviated IALA.

A sign language, now extinct, which developed on Martha's Vineyard (an island in Massachusetts).

A sign language used in South Africa.

A specialized vocabulary (perhaps not strictly a language) used in Haiti for religion, song, and dance purposes.

A sign language used in Yucatán, Mexico.

Maritime Sign Language

A sign language used in Hawaii. The language is named after the Hawaiian Pidgin spoken language and is not itself a pidgin.

The primary sign language of Liechtenstein and German-speaking areas of Switzerland.