Wae = why

Mwo = what

Omona = a somewhat meaningless word that serves as an exclamation and/or the question of 'really?'

Omo = equivalent of 'omg' or 'oh'

Ne = yes

Aniyo = no

Saranghae = I love you

Saranghamnida = formal version of saranghae

Yeobo = pet name for significant other that means 'honey'

Mianhe = I'm sorry

Kamsamnida = Thank you

Kamsamhamnida = Thank you very much

Cheonmaneyo = You're welcome

Annyeong = Hello/Goodbye

(I will add to this when I learn more or use something new~)