This is the 9513th most frequent Korean word.
경상도인데
"경상도인데" means "It is Gyeongsang Province," typically indicating someone's origin or location in Gyeongsang Province, South Korea.
Here, "경상도인데" is used to connect the clause describing the friend's origin with an additional fact about their dialect usage.
내 친구는 경상도인데 사투리를 잘 써요.
My friend is from Gyeongsang Province and is good at using dialect.
In this sentence, "경상도인데" introduces a contrasting idea between the subject's origin and the impression it gives.
그는 경상도인데 경기도처럼 느껴져요.
He is from Gyeongsang Province, but it feels like Gyeonggi Province.
"경상도인데" here adds an observation about the traditional feel in relation to the location.