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

He can speak Estonian.

He can speak the Rade language.

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

He went to China to learn the Zhuang languages.

This sentence uses many modifiers.

Learning Japanese idioms is difficult.

A suffix is a word that is added after another word, and it can change the meaning or form of that word.

I am thinking of learning Dutch.

He can speak Shanghainese.