His native language is Spanish.

I am thinking of learning Greek.

Asturian language is spoken in some parts of Spain.

He can speak Dutch fluently.

I am thinking of learning Serbian language.

He is learning Tibetan language.

I am thinking of learning Galician.

Learning Welsh is difficult.

He can speak Belarusian.

Japanese is one of the agglutinative languages, characterized by words being combined with affixes.