4. Language Attrition

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Language attrition is the loss of a first or second language or a portion of that language by either a community or an individual. Language attrition is related to multilingualism and language acquisition.

Many factors are at play in learning (acquisition) and unlearning (loss) the first and second languages. This can be a simple reversal of learning. In other cases, the type and speed of attrition depends on the individual, also on his or her age and skill level. For the same second language, attrition has been affected differently depending on what is the dominant first language environment.

In many cases, attrition could well be case-by-case. Those language learners motivated to keep their first and second languages may very well maintain it, although to do so will likely involve continuous study, or regular use of both.