Like all games, there are skills to learn and rules to follow. 

Language can disappear after severe damage to the brain. It is known as aphasia - the inability to understand or produce speech.

Research on adults with aphasia has demonstrated that math, theory of mind, and other cognitive abilities are independent from language....

Some games are educational or designed with problem-solving, critical thinking and reading comprehension built in. But it’s unclear if computer games improve general intelligence, although they seem to help teach and reinforce these new skills.