No, they have a label for someone who tries to do what you described, they are called 루저벡홈 or literally "Losers back home", or typically a white person that uses their racial status exactly in the manner you described.
It might have worked in the 60s or in South East Asia but certainly will not work anymore in East Asia, especially in a hyper connected world. In fact many foreigners who achieved celebrity status by lying were quickly cancelled.
By large, a non-asian person in East Asia is largely limited to an exotic animal at the zoo. Somewhat of a novelty for kids and adults to point and laugh "wow! we have foreigners in our country speaking our language".
You would see the same response towards a monkey suddenly speaking Korean or Japanese.
It might have worked in the 60s or in South East Asia but certainly will not work anymore in East Asia, especially in a hyper connected world. In fact many foreigners who achieved celebrity status by lying were quickly cancelled.
By large, a non-asian person in East Asia is largely limited to an exotic animal at the zoo. Somewhat of a novelty for kids and adults to point and laugh "wow! we have foreigners in our country speaking our language".
You would see the same response towards a monkey suddenly speaking Korean or Japanese.