Thank you for the opportunity to help you with your question!
Language in the form of the power is a form of knowledge. Being that a particular set of words can be spoken by someone,it can apply to the fact that person has skill. Culture is based off the dialect that is resonated from the spoken words. The sounds form a behavior that transcends into a tradition. Identity comes with culture, and since culture derives from the language, it link with identity.
Please let me know if you need any clarification. I'm always happy to answer your questions.