Philosophy of language studies (mainly human) language and is a area of Philosophy closely connected to Logic. It aspires understanding of meaning (semantics) by systematical analysis. Language is something you learn and something you use. We see, that the meaning of language is influenced by many factors, which could be categorized into a) the way language refers to the world, and b) the logic of the sentence. While both aspects are dealt with both in philosophy and in linguistics, the latter of course is subject of logic.