A recurring question in the literature of heritage language acquisition, and more generally of bilingual acquisition, is whether all linguistic domains are sensitive to input reduction and to cross-linguistic influence and to what extent. According to the Interface Hypothesis, morphosyntactic phenomena regulated by discourse-pragmatic conditions…

The sociolinguistic phenomenon of bidialectism can significantly influence foreign-language learning. This study provides empirical evidence (drawn from the Greek Cypriot bidialectal community) for this influence and it supports the recommendation that foreign-language educators be trained in language-variation issues. The study's methodological…