An interlanguage's an emerging linguistic system that's been developed by a learner of a second language (or L2) who hasn't become fully proficient yet but's only approximating the target language: preserving some features of their first language (or L1) in speaking or writing the target language and creating innovations. An interlanguage's idiosyncratically based on the learners' experiences with the L2. It can fossilize in any of its developmental stages. The interlanguage consists of: L1 tran… (More on Interlanguage)