Acronyms are a convenient way to convey information briefly.

Esperanto is an international artificial language.

He can speak Finnish.

I have started learning Hebrew.

I am thinking of learning Greek.

His native language is Spanish.

They are using English as a common language.

He always speaks in polite language, so he is considered very courteous.

His laughter can be expressed with the onomatopoeic word 'gyahaha'.

She refused the pillow business.