The differences in the language, a book in the vocabulary of the language classified by Abu Hilal al -Hasan bin Abdullah bin Sahl bin Saeed bin Yahya bin Mahran al -Askari, is considered a reference of the Arabic language references to language scholars, which contains a lot of linguistic information in the meanings of words. He said in the introduction to the book: He dedicated it to explaining the converging words meaning and the interpretation of the sects of the difference between them