The Agni-Kuchi or Agni-Kuči languages, often but improperly called Tocharian languages, and formerly Arśi-Kuči languages, are an extinct language family belonging to the Indo-European languages; they are chiefly attested during the Early Middle Ages in the Tarim Basin (in today's Xinjiang, Central Asia).
This family is known thanks to writings in two neighbor languages:
- Bernard SERGENT (2005 ) Les Indo-Européens: histoire, langues, mythes, Paris: Payot
- Bernard SERGENT (1998) “Les Sères sont les soi-disant «Tokhariens», c'est-à-dire les authentiques Arśi-Kuči”, Dialogues d'histoire ancienne, vol. 24, nr. 24-1; 7-40