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The large number of living languages in the initial inventory of ISO 639-3 beyond those already included in ISO 639-2 was derived primarily from Ethnologue (15th edition)." /> <meta name="generator" content="Drupal 7 (https://www.drupal.org)" /> <link rel="canonical" href="https://iso639-3.sil.org/about" /> <link rel="shortlink" href="https://iso639-3.sil.org/node/1226" /> <title>About ISO 639-3 | ISO 639-3</title> <link type="text/css" rel="stylesheet" href="https://iso639-3.sil.org/sites/iso639-3/files/css/css_lQaZfjVpwP_oGNqdtWCSpJT1EMqXdMiU84ekLLxQnc4.css" media="all" /> <link type="text/css" rel="stylesheet" href="https://iso639-3.sil.org/sites/iso639-3/files/css/css_JzcRnZ0FsBeHL2qERyUIAT5OGz84eMR-Xf97NI67gxg.css" media="all" /> <link type="text/css" rel="stylesheet" href="https://iso639-3.sil.org/sites/iso639-3/files/css/css_3zHl1XfaSAV8b3I31tN_cS7d_ar71vNpN8EklG7vlE4.css" media="all" /> 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class="region region-navigation"> <section id="block-menu-menu-glossary-switcher" class="block block-menu clearfix"> <ul class="menu nav"><li class="first leaf"><a href="/code_tables/639/data">Code Tables</a></li> <li class="last leaf"><a href="/code_changes/change_request_index/data">Change Requests</a></li> </ul> </section> </div> </div> </div> </div> </div> <div class="main-container container"> <div class="row"> <section class="col-sm-9 main-content-column"> <div id="page-title"> <h2 class="page-title">About ISO 639-3 </h2> </div> <a id="main-content"></a> <div class="region region-content"> <section id="block-system-main" class="block block-system clearfix"> <div class="ds-1col node node-page view-mode-full clearfix"> <div class="field field-name-body"><h2>聽</h2> <h2 style="line-height:1.32; background-color:#ffffff; margin-top:20px; padding:0pt 0pt 8pt 0pt"><span style="font-size:21pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:'Source Sans Pro',sans-serif"><span style="color:#0043a0"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">What is ISO 639-3?</span></span></span></span></span></span></h2> <p style="line-height:1.38; background-color:#ffffff; padding:0pt 0pt 8pt 0pt"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#333333"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">ISO 639-3 is a set of codes that defines three-letter identifiers for all known human languages. At the core of ISO 639-3 are the individual languages already accounted for in </span></span></span></span></span></span><a href="https://www.loc.gov/standards/iso639-2/langhome.html" style="text-decoration:none"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#6600cc"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">ISO 639-2</span></span></span></span></span></span></a><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#333333"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">. The large number of living languages in the initial inventory of ISO 639-3 beyond those already included in ISO 639-2 was derived primarily from </span></span></span></span></span></span><a href="http://archive.ethnologue.com/15/" style="text-decoration:none"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#6600cc"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">Ethnologue</span></span></span></span></span></span></a><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#333333"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none"> (15th edition). Additional extinct, historic, and constructed languages were obtained from the </span></span></span></span></span></span><a href="http://linguistlist.org/forms/langs/get-extinct.cfm" style="text-decoration:none"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#6600cc"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">Linguist List</span></span></span></span></span></span></a><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#333333"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">.</span></span></span></span></span></span></p> <p style="line-height:1.38; background-color:#ffffff; padding:0pt 0pt 8pt 0pt"><span style="font-size:18pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:'Source Sans Pro',sans-serif"><span style="color:#0043a0"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">Language Coding Agency</span></span></span></span></span></span></p> <p style="line-height:1.38; background-color:#ffffff; padding:0pt 0pt 8pt 0pt"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#333333"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">SIL International functions as the Language Coding Agency for Set 3 of the ISO 639 language code standard under</span></span></span></span></span></span><a href="https://standards.iso.org/iso/639/ed-2/en/Terms%20of%20Reference%20of%20the%20ISO%20639%20Maintenance%20Agency%20(ISO%20639_MA).pdf" style="text-decoration:none"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#1155cc"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:underline"><span style="-webkit-text-decoration-skip:none"><span style="text-decoration-skip-ink:none"> ISO639/MA-ToR</span></span></span></span></span></span></span></span></a><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#333333"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">, the Terms of Reference for the ISO 639 Maintenance Agency.聽 SIL is responsible for receiving and registering Change Requests unique to language identifiers in Set 3 of ISO639:2023, </span></span></span></span></span></span><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#333333"><span style="font-weight:400"><span style="font-style:italic"><span style="text-decoration:none">Code for individual languages and language groups.</span></span></span></span></span></span><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#333333"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none"> The ISO 639-3/LCA receives and reviews applications for requesting new language codes and for the change of existing ones according to criteria indicated in the standard. It maintains an accurate list of information associated with registered language codes which can be </span></span></span></span></span></span><a href="https://iso639-3.sil.org/code_tables" style="text-decoration:none"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:'Source Sans Pro',sans-serif"><span style="color:#0043a0"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">viewed</span></span></span></span></span></span></a><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#333333"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none"> or </span></span></span></span></span></span><a href="https://iso639-3.sil.org/code_tables/download_tables" style="text-decoration:none"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:'Source Sans Pro',sans-serif"><span style="color:#0043a0"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">downloaded</span></span></span></span></span></span></a><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#333333"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none"> from this website, and processes </span></span></span></span></span></span><a href="https://iso639-3.sil.org/code_changes/change_management" style="text-decoration:none"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:'Source Sans Pro',sans-serif"><span style="color:#0043a0"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">updates</span></span></span></span></span></span></a><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:Arial,sans-serif"><span style="color:#333333"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none"> of registered language codes.</span></span></span></span></span></span></p> <p style="line-height:1.38; background-color:#ffffff; padding:0pt 0pt 8pt 0pt">聽</p> <p style="line-height:1.38; background-color:#ffffff; margin-bottom:11px"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:'Source Sans Pro',sans-serif"><span style="color:#3b3b3b"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">This is the official site of the ISO 639-3 Language Coding Agency. </span></span></span></span></span></span></p> <p style="line-height:1.38; background-color:#ffffff; margin-bottom:11px"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:'Source Sans Pro',sans-serif"><span style="color:#3b3b3b"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">Contact us:</span></span></span></span></span></span></p> <p style="line-height:1.38; margin-left:40px; background-color:#ffffff; margin-bottom:11px"><span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:'Source Sans Pro',sans-serif"><span style="color:#3b3b3b"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">SIL International</span></span></span></span></span></span><br /> <span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:'Source Sans Pro',sans-serif"><span style="color:#3b3b3b"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">鈥婭SO 639-3 Registrar</span></span></span></span></span></span><br /> <span style="font-size:10.5pt; font-variant:normal; white-space:pre-wrap"><span style="font-family:'Source Sans Pro',sans-serif"><span style="color:#3b3b3b"><span style="font-weight:400"><span style="font-style:normal"><span style="text-decoration:none">7500 W. 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