I'm sorry, but I don't speak Japanese.

I am studying for the Japanese Language Proficiency Test next year.

Natural language understanding is an important field of artificial intelligence.

His first adjective is 'beautiful'.

He is learning how to use the second adjective.

He is interested in the study of international auxiliary languages.

I take dietary supplements every day.

He understands the meaning of the proverb 'Teaching is half learning', which means that teaching leads to one's own learning.

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'