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