illegal in English:

We have a legal obligation to pay our taxes.

Was the Missouri Compromise legal?

Slavery was legal there.

Legal services will be provided by lawyers and other experts to be appointed by the government.

In legal documents, difficult words and phrases are often used.

The legal system in America is the world's finest.

Common-law relationships are not legal unions in France.

In many places it isn't legal to walk a dog on the beach.

Much legal language is obscure to a layman.

The widespread application of administrative guidance is considered to be a uniquely Japanese practice in which bureaucrats exert authority, without any legal backing, telling the private sector what to do and what not to do.

A legal kiss will never equal a stolen one.

The U.S. would be nothing without its immigrants, legal and illegal.

A marriage is not legal unless certain declarations are made.

Legal changes threaten online sales in digital commerce.

In legal terms, children are called "issue."