Interlanguage

Interlanguage refers to the a dynamic language system that exists in the mind of a language learner.

The Evolution of the Interlanguage
The interlanguage is the set of rules that the learner uses to generate sentences for their new language.

In the beginning, the interlanguage is very volatite, with little consistency.

As the learner learns more, some rules develop, which may or may not be the rules of the target language, but these rules are applied with a degree of consistency. These incorrect consistencies manifest as language errors, which can be anlysised and that can give us insight into why the learner is making the mistakes they are making.

Eventually, if the learner continues to progress in learning the new language, the rules of the interlanguage will begin to approximate the rules of the target language.