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◐ Language & Linguistics·2 min·Updated Mar 16, 2026

What is Interlanguage?

Interlanguage

Quick Answer

A learner's evolving language system when acquiring a new language is known as Interlanguage. It reflects the intermediate state between their native language and the target language they are learning.

Overview

Interlanguage is a concept in language acquisition that describes the unique language system created by learners as they study a new language. This system is influenced by their native language but also incorporates elements of the new language they are trying to master. As learners progress, their interlanguage evolves, showing both their understanding and the mistakes they make along the way. For example, a Spanish speaker learning English might say, 'I have 25 years' instead of 'I am 25 years old.' This reflects their understanding of how to express age but also shows the influence of their native language structure. Such errors are not just mistakes; they are important steps in the learning process, helping educators understand how students are developing their language skills. Understanding interlanguage is crucial because it highlights the natural progression of language learning. It indicates that learners go through stages where they apply rules from their native language while gradually adopting the new language's rules. By recognizing these stages, teachers can provide better support and resources tailored to the learner's specific needs.

Frequently Asked Questions

Interlanguage is caused by the influence of a learner's native language and the new language they are trying to learn. It emerges as learners attempt to communicate using the new language while still applying familiar rules and structures from their first language.
Interlanguage can affect language learning by showing where a learner is in their understanding of the new language. It can highlight specific areas where they need more practice or instruction, allowing teachers to tailor their teaching methods.
Yes, interlanguage can be beneficial as it represents a learner's progress and understanding. It allows educators to identify common errors and address them, ultimately leading to more effective language acquisition.