kid knows how to speak more languages than you can count

He just learnt one sentence in all the languages it's not that hard ( plus I'm french and i can't even understand the french part except bonjour)

He is a street vendor and is selling something he just knows what to say to sell his product in different languages. It's still a big thing

I counted ten languages but the video froze so I can't see the rest and see if he spoke more languages. He learned how to say one sentence in each language which is impressive and very smart.

I'am 15 and i can only speak 4 languages

1) how do I know what he's saying makes any sense? Anyone can say a few words of jibberish in each language.
2) I can count way higher than that