The concept of little language seems to be echoed and amplified in the concept of Language Oriented Programming:
Wikipedia [L1 ] says "Language oriented programming is a style of programming in which, rather than solving problems in general-purpose programming languages, the programmer creates one or more domain-specific programming languages for the problem first and solves the problem in those languages."
This paper [L2 ] seems to define and promulgate the term. This [L3 ] describes a particular approach to implementing LOP.
[L4 ] is another implementation approach
[L5 ] and [L6 ] are just some links I haven't yet processed CMcC