Although language and literacy are two different skills, they are closely related. Language is the ability to both use and understand spoken words or signs. It is all about ideas passing from one person to another. Literacy is the ability to use and understand written words or other symbols in order to communicate.
Source: Language and literacy | eclkc. (2019, June 10). https://eclkc.ohs.acf.hhs.gov/school-readiness/home-visitors-online-handbook/language-literacy