Sign Language
 
Sign language
is
used
 
as
 
a
 
way
 
of
communicating
 
 
by
millions
 
of
people
worldwide,
 
particularly
 
those
 
in
 
the
deaf
community.
According
to
 
the
World
Health
Organization
more
 
than
 
360
million
people
have
hearing loss,
 
 
This
 
is
expected
 
to
rise
to
700
million
people
 
 
by
2050.
People
have been
using
different
variations
 
of
sign language
 
around
 
the
world
 
for
centuries.
 
 
Only
 
in
 
the
last
50 years
has
signing
been
considered
 
an
official
language
 
in
many
countries.