Same in Slovenia (and other parts of Europe). My mother and her relatives will use words when speaking their village dialect that someone from a short distance away could not comprehend.

In this Reddit story, I think they did things like get him Mandarin lessons, practice various customs, find a Chinese "uncle and aunt" to take him to dim sum and whatever else. Then when signing his son up for college applications, the father noticed the surnames of his kid's birth parents were very typical Korean names. All those good intentions!