Once again we lack information here. Which installation device did you use?
If you used one of the DVDs, you should have Czech available. If you used a 32-bit LiveCD, maybe you chose the wrong one.
European set 1 of languages: Deutsch, English (several variants), Greek, Español, Français, Italiano, Dutch, Português, Português do Brasil, Turkish.
European set 2 of languages: Bulgarian, Czech, Danish, American English, Estonian, Finnish, Croatian, Hungarian, Lithuanian, Latvian, Norwegian Bokmaal, Norwegian Nynorsk, Polish, Romanian, Russian, Swedish, Ukrainian, Uzbek, Uzbek (cyrillic).
Czech is available on the second European set of languages. Maybe you downloaded the first one?
Posted: Jun 12th, '11, 11:14