This is the 7277th most frequent Polish word.
język
"Język" means "language" or "tongue" in English.
Here, 'język' is used to mean 'tongue', the organ in the mouth involved in speaking and tasting.
Odgryzłem sobie kawałek języka.
I bit off a piece of my tongue.
In this context, 'język' is metaphorically used to refer to a 'language' or system of expression, such as artistic expression.
Język sztuki potrafi wyrazić to, co słowa nie mogą.
The language of art can express what words cannot.
In this sentence, 'język' refers to a 'language', specifically English, as a medium of communication.