2.A written language, written language is a language that humans use letter mark instead of speech in communication. Written language is the symbol of the speech. Written language is what humans invented to save the spoken language., although linguists is written not actual language of human beings. However, written language is an important tool for human communication. For a long time, humans use written language to communicate both in personal, social and work.Understanding and help to solve various problems in human society a lot if humans know choose to suit the individual opportunity and the situation.