Vocabulary

言うまでもなく

obviously; as we all know; needless to say; of course; it goes without saying

expression

Example sentences

He can speak French, not to mention English.

He can speak French and German, not to mention English.

He can speak German, not to mention English and French.

He can speak French, and it goes without saying he can speak English too.

He doesn't speak English, and don't even mention French.

He knows no English, not to mention German.

He knows German and French, not to mention English.

Needless to say, he is right.