Lucas doesn't pronounce the s normally but he does for English-speakers to make it easier
I do something similar in France because it's easier for them, and me.
FR
"What eez your nem?" / « Tu t'appelles comment ? »
"Er, 'Two reindeer"*
"Ah, très bien !"
UK
"What's your name mate?"
"Darren"
*Deux rennes
(Or even d'hareng = herring)