I suppose I am showing my age if I state how interested I have always been by space exploration. So, I have been very interested in newspaper coverage and television coverage of Tim Peake's flight.
One of the aspects that drew my attention was his need to study Russian during his training, This was not surprising as he is traveling in a Russian craft and the Star Gazing programme last night mentioned how Russian is naturally the working language for the Soyuz flights although English will be used on the ISS. The international nature of the ISS also presumably means there would need to be a high degree of intercultural competence on the part of the cosmo/astronauts.
Probably most viewers would have been aware of his physical, psychological and scientific skills but linguistic and intercultural competence must also be vital for these cosmo/astronauts.