How did you know I was Korean?

(1)I’m from Korea.
(2)I know Korea well.
(3)How do you speak in Korean?
(4)I work for the International Nuns Association.
(5)In Seoul, now it’s Gasan Digital Complex, so Guro.
(6)Garibong-dong, Guro-gu
(7)I went to Korea for the first time in 1992.
(8)It’s hard to say in Korean.
(9)Just roughly.
(10)These shoes look like Koreans.
(11)Koreans always do that without socks.