He can speak Hakka.

He is interested in the study of international auxiliary languages.

Pragmatics is a part of linguistics that considers not only the meaning of sentences but also their usage situations.

The Slavic languages are one of the major language groups in Europe.

Slavic languages are one of the major language groups in Europe.

The Italic languages refer to a series of languages including Latin.

The Austronesian languages are one of the most widely distributed language families in the world.

The Austroasiatic languages, including Vietnamese and Khmer, are a language family that includes many languages.

The Baltic languages are part of the Indo-European language family and are mainly spoken in countries around the Baltic Sea.

The Celtic languages are ancient languages of Europe, and are still spoken in some parts today.