빨리(ppal-ri, ppalri)
Commonly used in everyday spoken Korean to naturally express quick speed.
When to use
casual conversation, spoken language, friendly request, quick action demand
The nuance
Primarily used in spoken or casual contexts, placed before verbs as an adverb.
빠르게(ppa-reu-ge, ppareuge)
Used in formal situations or writing to express quick speed more precisely and politely.
When to use
official documents, formal presentations, writing, polite expression
The nuance
Used in written or formal contexts, placed before verbs as an adverb.