Concerning the fundamental concepts in the field of the teac...

Interlanguage shares far more elements of the learner’s foreign language than those of his or her mother tongue.

Two of the main factors that contribute for interlanguage are overgeneralization and language transfer.

Different learners create the same kind of interlanguage.

The learner’s linguistic background and personal experiences are irrelevante to the shaping of his or her interlanguage.

Interlanguage creates a set of fixed rules to help the learner build a bridge between his or her first language and the second or foreign language.