You may also apply to undertake a study period at Charles University as a free mover – i.e. independently, not as part of an established scholarship/exchange programme. In this case you should contact the relevant Charles University faculty, which will decide whether it will accept you for a period of study as a free mover, and under what conditions (e.g. whether any tuition fees would be charged, etc.).
Links to the international offices of Charles University faculties: