Artificial languages

Concept of artificial languages.
Artificial languages are languages with special grammar and vocabulary, what people create and use for:
It is the flag of artificial languages:

1
Coding or other work with data and computers. For example, «Python» is a very popular constructed IT language with wonderful possibilities.

2
Easy communication with foreigners, who are know the same artificial language as you. Legendary «Esperanto» is the best example.

3
Making the Universes in books/films /games/fairy tales. For example, NA’VI language was constructed by one person for movie «Avatar».