la France
French.
they call it april fish day
All three phrasings are correct, but they may have slight differences in use and connotation. "What do you call" is more common for asking about the name or title of something, while "How do you call" can be used in a similar way but might suggest a method or process of naming. Both can be suitable when asking about the name of people in France.
France. Typicaly people call Paris the city of love.
French call their country France.
No, it is not illegal to call a pig Napoleon in France.
they call it sex
The name France comes from Franks (Francs in French) this is an old Germanic people that invaded the Roman Gaul just after the end of the Roman empire. They created a realm which can be concidered as the ancestor of the French state, France.
"Currency" is "la monnaie" in French. L'Euro est la monnaie utilisée en France > the Euro is the currency used in France.
France Jr and France Jr 2
In France the flag is called 'le drapeau'. You may call it 'le drapeau tricolore' if you want to insist that it has three colours in it.