The Brazilian, who moved to Merseyside from Gremio in 2007, is thought to be the best at adopting the Scouse accent, while Shelvey has deemed Jordan Henderson as the most intelligent in the squad.
"Lucas does a good Scouse impression," Shelvey told the club's official matchday programme. "I'm going to go with Hendo [as the cleverest]. He's quite sensible and I think he's got an old head on a young boy's shoulders."
Earlier this month, the former Charlton Athletic midfielder hit back at critics via social network site Twitter.