Japanese here!
In Japan we call guinea pigs Marmots (but more pronounced like Molu-mot)
So the name Molcar is a play on that.
The wheek sounds we say pui pui.
I asked my boyfriend who is living in the Netherlands if he could find it on Netflix. He said searching “Pui” and it came up.
I hope it is also available for people in Netflix UK!
Edit:
Because of the series, guides pigs are starting to become popular here as well.
I hope this will give people here a chance to educate themselves on guinea pigs because the information is so behind here.