The fortis sound in Korean is difficult to pronounce.

This problem is very difficult.

I am studying Korean language.

His English pronunciation is very natural.

He is practicing the pronunciation of Japanese.

This dark-colored dress is very elegant, isn't it?

This dark purple dress is very elegant, isn't it?

The rich sauce of this pasta is delicious.

This red is very deep, isn't it?

I am going to travel to South Korea next week.