Culture plays an important role in the global market today. It not only affects products, but also impacts on usability evaluation methods. In this paper we first introduce culture theories and two kinds of relationships in thinking aloud usability testing and then review previous research. Based on the discussion, we extract the potential factors which may influence cross-culture usability testing and then propose a relationship model. Finally, we discuss how the two thinking aloud approaches may be used in cross-culture usability testing.