A generic language
by hand gestures
rather than sound
. There are many different languages, usually one per country
, with many dialect
s within each country. Sign languages are usually developed organically, largely by the deaf community
. There is, however, an International Sign Language
that is similar to Esperanto
in idea, and was specifically created.
While sign languages are used primarily by the deaf community, in fact they are useful for anybody, when speech cannot be relied upon (because of loud background noise or similar).
For further examples, see American Sign Language and British Sign Language.