Against the background of the current expansion in study abroad identity scholarship, this paper is situated within research on non-Western students enrolled in study abroad programs based in non-Western countries. Focusing on multilingual Japanese undergraduates who studied in Turkey for a year and returned home 3-4 years ago as highly advanced speakers of Turkish. We present findings from face-to-face interviews with 25 former study abroad students, and were audio-recorded and transcribed. Focusing on the Bakhtinian concept of ideological becoming that students experience as a result of their sojourn, we investigate how it is constructed across the three languages in the students' repertoires that are in play in their study abroad experiences: Japanese, Turkish, and English. Our findings demonstrate that ideological becoming in the case of study abroad students concerns multiple languages in which students take active roles drawing on various timescales of their sojourn experience.