A treaty is a very, very formal document.
The President makes an executive agreement with Another Country instead of a formal treaty
it is an informal group
formal is the cinema and informal is a gay man
It's both formal and informal. It depends on how you say it. If you say "Adiós, señora." it's formal. If you say "Adiós, amigo." it's informal.
informal
formal and informal rhythm
what is formal and informal communication
formal
informal
Formal is polite, informal is rude and obnoxious.
There is no formal slang. Slang is informal language.
what is formal and informal shareholders agreement