"some sort of language" covers a wide range. Some song birds learn their songs, but the songs are stereotyped--the bird sings pretty much the same thing over a

"some sort of language" covers a wide range. Some song birds learn their songs, but the songs are stereotyped--the bird sings pretty much the same thing over and over, and there's no evidence that Bird A is communicating anything to other birds beyond "This is my territory, stay away!" to males and "Hey girl!" to females. Modern human languages are several steps above this on the Chomsky hierarchy, with at least context-free phrase structure, and in some cases reportedly context-sensitive phrase structure.