저는 한국 사람이에요 is "I am Korean" 제가 한국 사람이에요 is "It is me who is Korean" ('제가' has a connotation of meaning that 'it's me, not him/her)
in case of '한국 사람이에요', it's ellipsis of subject(저는, 그는.. etc) the meaning of the sentence is based on the context. if someone asks me where i'm from, i'll answer '한국 사람이에요'(i am korean) if someone asks me where my father is from, i'll answer '한국 사람이에요'(he is korean)
The Language Level symbol shows a user's proficiency in the languages they're interested in. Setting your Language Level helps other users provide you with answers that aren't too complex or too simple.
Has difficulty understanding even short answers in this language.
Can ask simple questions and can understand simple answers.
Can ask all types of general questions and can understand longer answers.
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