He was hiding the fact that he was an illegitimate child.

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

I'm a Muslim, so I fast during Ramadan.

I'm Jewish.

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

There are many cognates in English and German.

He can speak Montenegrin language.

He can speak Burmese.

He can speak Portuguese fluently.

He can speak Catalan.