Sign Languages in a sentence

Sign languages share many similarities with spoken languages (sometimes called "oral languages", which depend primarily on sound), which is why linguists consider both to be natural languages.

Linguists distinguish natural sign languages from other systems that are precursors to them or derived from them, such as invented manual codes for spoken languages, home sign, "baby sign", and signs learned by non-human primates.

There are a number of sign languages that emerged from French Sign Language (LSF), or are the result of language contact between local community sign languages and LSF.

American Sign Language American Sign Language (ASL) is similar to many other sign languages in that it has no grammatical tense but many verbal aspects produced by modifying the base verb sign.

Spatial grammar and simultaneity Sign languages exploit the unique features of the visual medium (sight), but may also exploit tactile features ( tactile sign languages ).

Stokoe notation is no longer used by researchers to denote the phonemes of sign languages; his research, while still considered seminal, has been found to not describe American Sign Language and cannot be used interchangeably with other signed languages.

The same principles have been applied to the analysis of sign languages (see Phonemes in sign languages ), even though the sub-lexical units are not instantiated as speech sounds.

Communication systems similar to sign language There are a number of communication systems that are similar in some respects to sign languages, while not having all the characteristics of a full sign language, particularly its grammatical structure.

Sign languages emerge through a natural process in communities just as verbal languages do, after a language community is formed, according to a linguist.

Creolization is seen as enriching overt morphology in sign languages, as compared to reducing overt morphology in spoken languages.

Further, sign languages, just like spoken languages, depend on linear sequencing of signs to form sentences; the greater use of simultaneity is mostly seen in the morphology (internal structure of individual signs).

Instead, sign languages, like all natural languages, are developed by the people who use them, in this case, deaf people, who may have little or no knowledge of any spoken language.

Linguistics In linguistic terms, sign languages are as rich and complex as any spoken language, despite the common misconception that they are not "real languages".

More than spoken languages, sign languages can convey meaning by simultaneous means, e.g. by the use of space, two manual articulators, and the signer's face and body.

On the whole, though, sign languages are independent of spoken languages and follow their own paths of development.

Professional linguists have studied many sign languages and found that they exhibit the fundamental properties that exist in all languages.

Sign languages generally do not have any linguistic relation to the spoken languages of the lands in which they arise.

Sign languages vary in how and how much they borrow from spoken languages.

The grammars of sign languages do not usually resemble that of spoken languages used in the same geographical area; in fact, in terms of syntax, ASL shares more with spoken Japanese than it does with English.

The prototype-A class of languages includes all those sign languages that seemingly cannot be derived from any other language.