Eighty-nine Korean-English and Spanish-English bilingual students expressively wrote in their native language, English, or both languages on four occasions or were assigned to a non-writing control group. In addition to self-reports of adjustment, participants wore a recording device that sampled their natural language at 30-second intervals every 12.5 min for 2 days both prior to and 1 month after the experiment. Overall, those assigned to the language switching condition showed the greatest improvements in adjustment and social engagement.