Language security includes three categories:language communication security,language ontology security and language strategic security,which act on individuals,communities and countries at the micro,meso and macro levels respectively.The combination of the three forms a complete concept of language security.Language ontology security is the basis and premise of language communication security and language strategy security.The security of language communication and the security of language strategy can promote the security of language ontology.As a representative form of language security at p...