Abstract

Current research suggests that conceptual in?uences are primarily responsible for inducing synaesthesia, since numerous synaesthetic variants are triggered by linguistic symbols. These linguistic synaesthesias are the focus of the present review article. This article examines the literature on the transfer of synaesthetic colour-associations across languages and shows the scope of the linguistic mechanisms that are implicated. We review known evidence about the interaction between grapheme-colour synaesthesia and the acquisition of a second language, and specifically, we discuss cases of cross-linguistic transfer in which a second language is learned later in life. Research on bilingual subjects has uncovered distinct representations in the brain for a mother tongue and for a later-acquired foreign language. Consequently, these differences have implications for synaesthesia associated with the writing systems of these different languages. By reviewing several individual cases of bilingual synaesthetes, we conclude that synaesthesia might have different types of influences on the acquisition of a second language, ranging from effects that support this learning to those that disturb it.