Why do French people do not use le, la or les in front of Monaco and Madagascar

Hi Nelly,

Please take a look at the following answer to a similar question.

https://progress.lawlessfrench.com/questions/view/why-is-israel-in-effect-neutral-gender

The full title of Monaco is 'La principauté de Monaco' which is shortened to Monaco.

Madagascar, like many islands, doesn't have an article in front of their names.

Bonne Continuation!