Concepts in language policy

language with de jure or de facto national status

language that is spoken internationally and often learned as a second language

opposition to foreign influence on a language

deliberate effort to influence the function, structure, or acquisition of languages or language variety within a speech community

language spoken in an area of a sovereign state

substitution of a community's language by another one over time

language that is given a unique legal status in a supranational society

sign written in two languages

writing system that is specifically designated to be official in some jurisdiction by law

concept of language having or being influenced by ideology

language used in teaching

way language and linguistic differences between peoples are dealt with in the political arena

Wikimedia list article

attitudes biased toward an abstract, consistent, institutionally maintained language based on the written standard and the spoken acrolect