This paper describes a study investigating the usage of Computer-Mediated Communication (CMC) and its impact on language transformation in the context of youth in Arabic-speaking populations, specifically in Saudi Arabia. In particular, this project examined patterns of CMC using BBM and WhatsApp captured in a qualitative diary study comprised of logs and reflection. Gender and individual differences in the CMC patterns and factors contributing to the transformation of language in CMC communication (e.g. Arabizi) are discussed. Design implications are described .