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| | Proposed ISO 639-2 code for Sign Languages |
 | | Although linguists have for decades recognized them as true languages, the world's Sign Languages, used by Deaf and hearing people, were overlooked during the drafting of ISO 639-2, the standard which specifies 3-letter codes to identify the names of languages. |
 | | It is here proposed that a single 3-letter code, sgn, for Sign Languages be added to ISO 639-2, and that, as necessary, other codes be appended to that code to specify different Sign Languages. |
 | | A number of them require additionally one of the regional extensions specified in ISO 3166-2; some extensions are language codes taken from the Bibliographical codes found in in ISO 639-2 where further precision is required, such as where more than one Sign Language occurs in a country. |
| www.evertype.com /standards/iso639/sign-language.html (452 words) |
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