Formal speech is not slang. Example:
Slang: the weather is cool.
Formal: the weather today is mighty fine, is it not?
Another word for a formal speech is an oration or a discourse.
This is Formal Speech.
All of the languages of Argentina have formal speech and informal speech. Spanish is the national language, but it isn't considered more formal than the others.
the good one.
the act of formal speech-making
Another word for a formal speech is an oration or a discourse.
Formal is an adjective.
Single verbs are used for formal speech or writing.
formal!
Interjection is the part of speech rarely used in formal writing.
the good one.
This is Formal Speech.
All of the languages of Argentina have formal speech and informal speech. Spanish is the national language, but it isn't considered more formal than the others.
Decicimer
the good one.
It depends on the type of speech. In an informal speech, slang is fine; in a formal speech, you should avoid slang.
I'm not sure whether you are asking about "formal" (which is an adjective) or "in" (which is a preposition).