Haha, I have an Alien Number so I'm familiar with that. "Transplant" as the word for "immigrant" is pretty common in coastal California. Here are a few examples that should illustrate:

* The Bold Italic[0] - a popular San Francisco essay magazine talking about transplants

* Eric Adams is quoted by the WaPo prior to announcing his candidacy for mayor[1] (he was eventually elected mayor):

> “Go back to Iowa,” Adams, who is expected to be a top Democratic contender in New York’s 2021 mayoral race, told transplants. “You go back to Ohio! New York City belongs to the people that [were] here and made New York City what it is.”

* Great Replacement Theory is reframed[2]:

> ...multi-decades-old Black businesses and Black-owned or traditionally Black folk-rented homes are being replaced by a new population–some call them transplants.

I think it's pretty common lingo these days on the left. If you ask an LLM what a "transplant" is in the context of people, it can easily describe the term[3]. I say that only to say that it is commonly enough used as such that it is recognizable.

0: https://www.thebolditalic.com/the-last-black-man-in-san-fran...

1: https://www.washingtonpost.com/nation/2020/01/21/adams-brook...

2: https://ourtimepress.com/say-it-aint-so-developers-target-sm...

3: https://claude.ai/share/bf6cfb17-314a-4e4b-b3eb-e99bbed07e86