This is the 2826th most frequent German word.
spanischen
"Spanischen" means "Spanish" (adjective, referring to something from Spain).
The word 'spanischen' is an adjective in plural form and modifies the noun 'Tapas', indicating their origin from Spain.
Die spanischen Tapas sind sehr lecker.
The Spanish tapas are very delicious.
Here, 'spanischen' is used as an adjective in singular form, modifying the masculine singular noun 'Museum', describing its Spanish origin.
Wir besuchen das spanische Museum in der Altstadt.
We are visiting the Spanish museum in the old town.
In this case, 'spanischen' is an adjective in plural form modifying the plural noun 'Könige', referring to kings from Spain.