Interlanguage or L1 hypothesis

The learner naturally develops an interim form of language that is a mixture of L1 & L2 because they will “fill in” with the first language skills where s/he doesn’t know the form in L2.

The learner naturally develops an interim form of language that is a mixture of L1 & L2 because they will “fill in” with the first language skills where s/he doesn’t know the form in L2.