All the onboard items of equipment are in simplified Chinese characters. Potential foreign taikonauts must learn to read, to speak Putonghua [common Chinese] to enable proper unambiguous communication in the space station, although the Chines taikonauts can speak English, but that is not the point. I read somewhere a German, a French and an Italian are seriously learning Chinese for a couple of years now so when selected to get on board the CSS they would have no problems at all in communication with the Chinese counterpart.