He finds it difficult to understand his own internal language.

He is honing his skills as a practitioner of erotic bondage.

He smoothly played the fingerboard of the guitar.

He felt bound by the contract.

He tied up his hands and feet and put him in the corner of the room.

I am majoring in linguistics at university.

He is an expert in natural language processing.

I am studying Modern English.

I study classical language every day.

This book is written in the original language.