잘 자요 is polite daily for friends and partners. 안녕히 주무세요 is honorific formal for elders, grandparents, teachers, boss.
Yes, especially couples and close friends text 잘 자요 or 좋은 꿈 꾸세요 every night. It's part of Korean texting culture.
Konglish 굿나잇 is used casually among young people, but 잘 자요 is more natural Korean.
잘 자요 means "Good night / Sleep well". 잘 (jal) = well, 자다 (jada) = to sleep, 자요 (jayo) = polite. Most common nightly phrase in Korea - couples text it every night. To elders use 안녕히 주무세요.
1. Partner / friend at night: 잘 자요
2. Sweeter wish: 좋은 꿈 꾸세요
3. Grandparents / boss: 안녕히 주무세요
I'm going to sleep now. Good night!
Sweet dreams. See you tomorrow.
Grandma, please sleep well. (Formal)
Good night, let's call tomorrow. (Casual)
• 좋은 꿈 꾸세요 (joeun kkum kkuseyo) - Sweet dreams
• 안녕히 주무세요 (annyeonghi jumuseyo) - Formal good night
• 잘 자 (jal ja) - Good night (casual)