Vian has been picking up a few words courtesy of Sempi. The words he has picked up so far are the ones that Sempi uses with forceful emotion.
Whenever Vian tries to take Sempi's toys, Sempi yells "STOOOOP" with conviction and distress. So that's the first word that Vian decided to pick up. Now he uses it with us generously. He can't quite pronounce the sound "ssss" so his STOP sounds like "TOP".
It's a catch all phrase for stopping anything that is unpleasant. So far he has used it to stop me from giving Yoshi hugs in front of him (jealousy). It is hilarious to watch him command his toys to "TOOPPP" when they keep sliding off of the couch or the table where he's playing.
This is the second word that he's picked up from Sempi. But the twist is, Vian says NO with a tinge of joy and pride. We've asked Sempi to ask Vian's permission before taking toys from Vian's hands. Sempi being the older, more responsible brother will ask politely "Vian can I please play with the toy you have in your hand?" and Vian responds "NO" with a smile and enthusiasm. It looks absolutely savage when witnessed in person.
This one, I'm very glad he's picked it up from Sempi. Sempi is a total book worm. He asks us to read a book as soon as he wakes up, while eating, while lounging, right before bedtime, even while driving (instead we listen to podcasts while driving). Now Vian has picked up on this and he demands that we read to him while he eats. He can't pronounce "R" or "D" so it sounds more like a "WEE", "WEE". He get so excited about this that he would keep asking us to read even while we're reading him a book.