Formal means that you need to be dressed up for the interview. Informal means that you can come in casual clothing, I wouldn't suggest jeans.
without accent it does not have a specific meaningIf you meant "¿qué tal?" It has become a neutral expression in usage.
formal organisation have written directions, rules and regulations and a pre determine goal to achieve and formed. informal organisation is created by itself, it is necessary for formal org. it has no rules and regulations, but it helps formal organisation to attain its goals.
it is an informal group
It's the formal/respectful word for YOU. The informal word for 'you' is 'tu'
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.