This is the 2844th most frequent German word.
tschechischen
"Tschechischen" means "Czech" as an adjective in English.
In this sentence, 'tschechischen' is used as an adjective describing the noun 'Spezialitäten'. It matches the case, gender, and number of the noun it modifies.
Die tschechischen Spezialitäten sind köstlich.
Czech specialties are delicious.
Here, 'tschechischen' functions as an adjective modifying the plural noun 'Städte'. It is in the plural dative case.
Viele tschechischen Städte haben eine interessante Geschichte.
Many Czech cities have an interesting history.
In this example, 'tschechischen' is in the genitive case, describing ownership relating to 'Zugfahrpläne'.