This is the 840th most frequent Serbian word.
српски
"Српски" means "Serbian" in English.
In this sentence, 'српски' is an adjective describing the noun 'језик', indicating the language being discussed.
Говорим српски језик.
I speak Serbian language.
Here, 'српски' is used as an adverb referring to the manner in which something is said.
Научићу те како се српски каже 'здраво'.
I will teach you how to say 'hello' in Serbian.
In this usage, 'српског' is in the genitive case, showing origin or possession related to the Serbian language.