Language standards are a linguistic dictionary written by Ibn Faris, relying on five great books: Al -Ain Book by Al -Khalil bin Ahmed Al -Farahidi. Gharib Al -Hadith by Abu Ubaid Al -Qasim bin Salim. The stranger classified by Abu Ubaid al -Qasim bin Salim also. The book of logic by Ibn Al -Skit. The crowd by Ibn Dureid