लुप्तप्राय भाषा वह भाषा होती है जो वर्तमान में अनुपयोग हो रही है और लुप्त होने के कगार पर है। ऐसी भाषा के विलुप्त होने के कुछ मुख्य कारण होते हैं जिनमें इस भाषा के लोगों की संख्या धीरे-धीरे कम हो रही हो, या इसके बोलने वाले लोग अपनी भाषा को छोड़ दूसरी भाषा को ग्रहण कर रहे हों। भाषा का विलुप्त पूरी तरह तब होती है जब उसका कोई भी बोलने वाला नहीं बचता और इस तरह वह पूर्ण रूप से विलुप्त और समाप्त हो जाती है। मानव इतिहास में कईं भाषाएँ विलुप्त हुई हैं परन्तु वर्तमान में भाषाओं का विलोपन बहुत शीघ्रता से हो रहा है। इसके प्रमुख कारण हैं: वैश्वीकरण और नव-उपनिवेशवाद। अधिकतर यूँ होता है की जब भौतिक रूप से  प्रभावशाली और शक्तिशाली भाषाएँ दूसरी भाषाओँ पर अपना वर्चस्व साधती हैं, तब भौतिक रूप से निर्बल भाषाएँ विलुप्त हो जाती हैं।

अतिरिक्त अध्यन

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बाहरी लिंक 

 
 
 Resource Network for Linguistic Diversity
 Endangered Languages Project



संगघठन 
 Linguistic Society of America
 Schola, Latin Language revival network
 Hans Rausing Endangered Languages Project
 Documenting Endangered Languages, National Science Foundation
 Society to Advance Indigenous Vernaculars of the United States, (Savius.org)
 Advocates for Indigenous California Language Survival
 Indigenous Language Institute
 Sorosoro
 Enduring Voices Project, National Geographic
 Living Tongues Institute for Endangered Languages
 Endangered Language Alliance, New York City
 Google Endangered Languages Project
 DoBeS Documentation of endangered languages
 CILLDI, Canadian Indigenous Languages Literacy and Development Institute

प्रोद्योगिकी 
 Recording your elder/Native speaker, practical vocal recording tips for non-professionals
 Learning indigenous languages on Nintendo
 Pointers on How to Learn Your Language (scroll to link on page)
 First Nations endangered languages chat applications
 Do-it-yourself grammar and reading in your language, Breath of Life 2010 presentations

 Linguistic Society of America
 Schola, Latin Language revival network
 Hans Rausing Endangered Languages Project
 Documenting Endangered Languages, National Science Foundation
 Society to Advance Indigenous Vernaculars of the United States, (Savius.org)
 Advocates for Indigenous California Language Survival
 Indigenous Language Institute
 Sorosoro
 Enduring Voices Project, National Geographic
 Living Tongues Institute for Endangered Languages
 Endangered Language Alliance, New York City
 Google Endangered Languages Project
 DoBeS Documentation of endangered languages
 CILLDI, Canadian Indigenous Languages Literacy and Development Institute