This paper examines the use of CMC in both Japanese and English dominated "domains" by Australian learners of Japanese. The natural, social online communication of 12 Australian university students with 18 of their Japanese contacts was collected for a period of up to four years, resulting in a corpus of approximately 2,000 instances of blogs, e-mails, SNS interactions, chat conversations, game profiles, and mobile phone communications. To supplement this data, interviews were conducted to further explore participants' Internet communication and L2 use. These interviews, paired with evidence from the corpus of collected data, are analysed using Sealey and Carter's (2004) social realism framework in order to explore questions of language selection, identity construction and nationality, as well as what it means to be a "foreigner" online. (Contains 5 tables and 3 notes.)