An official language is in fact a national language.

What is bilingualism? What is a bilingual community? What does it mean that most bilingual communities have one thing in common?

elaboration

Explain and give examples to show in what way componential analysis is similar to the analysis of phonemes into distinctive features.

conversational implicature

language planning

cultural transmission(as defining feature of human language)

brain lateralization

caretaker speech

cerebral cortex

right ear advantage