As someone from Czech Republic, I am not surprised. There are sometimes huge differences between country names in czech and English. And the closer the country is, the bigger the difference.

For the German speaking countries eng - ger - cze: Germany - Deutschland - Německo Austria - Österreich - Rakousko Switzerland - Sweiz - Švýcarsko

Other examples (eng - cze): Czech - Česko Slovakia - Slovensko Slovenia - Slovinsko Greece - Řecko Georgia - Gruzie Spain - Španělsko Greenland - Grónsko Hungary - Maďarsko Croatia - Chorvatsko