Language and communication

How do you call the language first learnt by a person?

(a)  

How do you call a language which is spoken by a small number of people?

(a)  

How do you call a non-native language officially recognized and adopted in a multilingual country as a means of public communication?

(a)  

How do you call the language used within government (e.g. courts, parliament, administration)?

(a)  

When some nations share a language, that language is called a (a)   language.

A field of study that looks at how people from differing cultural backgrounds communicate is called (a)   communication

A language that is no longer learned as a native language by a speech community is called a (a)   language

Talking to someone in the flesh and communication using technology like video conferencing, and webcam are examples of (a)   communication.

Body language is an example of (a)   communication.