Proto-language (disambiguation)
A proto-language is a hypothetical or reconstructed language from which a number of known languages are believed to have descended in historical linguistics. Proto-language may also refer to:
 Proto-language (glottogony), primitive language-like systems or forms of communication posited in theories of the origin of language
 Proto-Human language, a hypothetical ancestor of all the world's languages
 Musical protolanguage, a theory of the origins of music and vocal communication

See also
 :Category:Proto-languages