Multilingual individuals who use augmentative and alternative communication (AAC) often shift between language environments and speakers of different languages; thus, code-switching (or alternating between languages or dialects within or across contexts) becomes necessary for effective communication. Recently, AAC product developers have responded to this need by building multilingual AAC systems; however, research in multilingualism and AAC is lacking. In this paper, we discuss theoretical and practical implications for research related to code-switching using aided AAC. We use available literature investigating the sociolinguistic, psycholinguistic, and usage-based aspects of code-switching in spoken or signed modalities as a starting point for considering code-switching using aided AAC. We present examples illustrating the varied expression of codeswitching across aided AAC modalities and discuss directions for future research.
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