Some previous work on multilingual topic models assume documents in multiple languages are aligned either at the document level, sentence level or by time stamps (Mimno et al., 2009;Zhao and Xing, 2006;Kim and Khudanpur, 2004;Ni et al., 2009;Wang et al., 2007).
chinese to English, we look up the bilingual dictionary and do word-to-word translation.