This problem is very difficult.

Learning how to use English articles is difficult.

I like to study new languages.

He can speak English fluently.

In French, the partitive article plays a very important role.

Learning Modern English is important for smooth international communication.

The study of Middle English is very important for understanding the history of English.

Wasei-eigo is a unique way of expression in Japan.

He can speak American English fluently.

I am learning Old English.