to speak vs to talk in Korean
말씀하다vs얘기하다

말씀하다to speak
말씀하다 means “to speak” or “to say” in a polite, respectful way. You use it when talking to someone important or when speaking about what a respected person said. It is common with teachers, parents, grandparents, customers, and other polite situations.
When to use to speak
얘기하다to talk
얘기하다 means "to talk" or "to chat" in everyday situations. You use it when people speak with each other about something. It is common for talking with friends, family, teachers, or other people in daily life.
When to use to talkHow they differ
to speak (말씀하다) and to talk (얘기하다) are nearby Korean vocabulary items learners often meet together. Use “to speak” when 말씀하다 means “to speak” or “to say” in a polite, respectful way. You use it when talking to someone important or when speaking about what a… Use “to talk” when 얘기하다 means "to talk" or "to chat" in everyday situations. You use it when people speak with each other about something. It is common for…