This paper presents a wearable device, Yak, as an aid to cross-language communication. Yak produces utterances in the native's langauge at the user's command. The use of a heads-up display allows the user to operate the device while maintaining eye contact with the native, and while sending and receiving non-verbal signals. % We believe this interaction paradigm will be valuable for many face-to-face encounters, for example as travelers deal with people in service roles, such as ticket agents, waiters, clerks. % This paper describes requirements for a communication aid, Yak's user interface, the Yak scripting language, Yak's current hardware configuration, and the results of preliminary experiments.