Theoretical linguistics is one of the branches of linguistics. It is the scientific study of human language away from normativity and philosophy. It is the science that studies language for its own sake and takes language as its subject by relying on the descriptive, historical and comparative approach. It also studies the relationships existing between different languages. It is a science concerned with the structure of language: Phonological, morphological, grammatical, semantic, and lexical. He also discusses theories of the emergence of language, phoneme theory, morphemes, and many modern theories.
