Noun
E-language (uncountable)
(linguistics) external language: language as transmitted and shared in the world or community rather than as perceived and understood in the individual
e language
E-Language encompasses all other notions of what a language is, for example that it is a body of knowledge or behavioural habits shared by a community. Source: Internet
In other words, in algebraic terms, the I-Language is the actual function, whereas the E-Language is the extension of this function. Source: Internet
Thus, E-Language is not itself a coherent concept, Chomsky, Noam (2001). Source: Internet