We report results of lexical accommodation studies involving three different interpretation settings: human-human monolingual; human-interpreted bilingual; and machine-interpreted bilingual. We found significant accommodation in all three conversational settings, with the highest rate in the human-interpreted setting. There is evidence for longrange mutual accommodation in that setting, as compared to short-range accommodation in the machine-interpreted setting. Motivations discussed in the accommodation literature, including speakers' concern for social standing and communicational efficiency, are examined in the light of the results obtained. Finally, we draw implications for the design of multimedia human-computer interfaces.