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
informal
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.
formal and informal rhythm
what is formal and informal communication
formal
informal
There is no formal slang. Slang is informal language.
what is formal and informal shareholders agreement
Formal is polite, informal is rude and obnoxious.