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

I am thinking of learning the Thao language.

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

In Japanese grammar, an autonomous forms the main part of the sentence.

Esperanto is one of the most well-known international auxiliary languages.

He went to China to learn the Zhuang languages.

He can speak Estonian.

He can speak the Rade language.

This sentence uses many modifiers.

Learning Japanese idioms is difficult.