Why do I need an internet connection to rename my Magikarp?

Any time I name a new Magikarp in Magikarp Jump, a screen briefly pops with "Now Transmitting" before I can continue playing.

As an experiment, I tried turning off my cellular data. When I went to rename my Magikarp, I was shown an error telling me to "Please check your connection and try again a little later."

Why do I need an internet connection to rename my Magikarp? Where is my Magikarp's nickname being sent?

The game is checking if your Magikarp's name contains swears, profanity, or other prohibited language.

If your Magikarp's name contains any prohibited words, you will be prompted to choose a different name.

Based on personal testing and a list from /r/MagikarpJump, blacklisted names include:

<sub>Boob, Butt, Dick, Tit, Ass, Shit, Bitch, Shine, Depression, Melon¹, Event, Poop, Weed, Kush, Muff, Murder, Zahar, Gay, GoldenShower, and Olaf.

¹ Bizarrely, while Melon is banned, Melons, Watermelon, and Water Melon are perfectly acceptable.</sub>