[Grammar] I'm Korean/ I'm a Korean...?

[wotcha]

1) I'm Korean.

2) I''m a Korean.

How are they different ans can we say 1) & 2) interchangeably?

 

[freezeframe]

1) I'm Korean. 'Korean' is an adjective.

2) I''m a Korean. 'Korean' is a noun.

How are they different ans can we say 1) & 2) interchangeably? Pretty much yes.

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