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Green proposed that this phenomenon occurs via his activation and inhibition model. A landmark study by Peal and Lambert examined the relation between this phenomenon and intelligence. The idea of multi-competence was developed to analyze people's measure of it. Its acquisition can be delayed by cross-meaning due to a type of "transfer." The distinction between the sequential and simultaneous forms of this ability depends on the time of acquisition of "L sub 2." People who possess this ability may be able to perform code-switching and may facilitate lexical borrowing. Communities marked by this phenomenon may exhibit diglossia or use a lingua franca. For 10 points, identify this ability of being proficient in more than one language.
Green proposed that this phenomenon occurs via his activation and inhibition model.
multilingualism [accept word forms; accept equivalents likepolyglots, bilingualism, or anything indicating speaking or learning a second language]