The aim of this book is to gain a better understanding of the bilingual brain and how words and sentences that use features from socially distinct languages are processed. Using examples provided by multilingual study participants, a categorization of the various forms of translanguaging is developed to build a translanguaging model. Psycholinguistic methods such as eye tracking are combined with conventional sociolinguistic survey methodology to provide rich qualitative and quantitative data that address the cognitive effects of translanguaging and the underlying structure of translingual word-formations. This monograph shows how language biography, exposure, and attitude towards multilingual discursive practices all affect cognitive processing. It also demonstrates how multilingual speakers are setting the patterns for novel word-formations to be produced, thus having a social, cultural, and cognitive impact on how we communicate.