Sydney Roosters officials will put their entire club through cultural training after Spencer Leniu revealed a common use of racial terms between players of diverse backgrounds across NRL squads during his judicial hearing.

Leniu was on Monday night banned for eight weeks after telling Brisbane's Indigenous star Ezra Mam to "f*** up you monkey", after hearing his name said by Mam in their opening-round clash in Las Vegas.

The suspension means Leniu will return in round 10 against the Warriors on May 12, one week after the rest of the Roosters face the Broncos in a return match in Brisbane.

After pleading guilty, Leniu's legal team pushed for a lighter four-game ban for the former Penrith premiership winner as the prop argued he was not aware of the racial connotations of the term.

Included in his argument was the claim that he thought he was "one brown man saying something to another brown man", and that casual slurs were regularly used between players with diverse backgrounds in NRL squads.

"A lot of people in my circle and in the same skin tone to me, our slang and how we speak to each other has all those words," Leniu told the panel during a 90-minute hearing.

"Black c***, and all those types of words are used. They are so common in our language that we speak to each other every single day."

It was in that context that Leniu claimed he believed his comment to Mam was simply "banter", before he was contacted by an Indigenous woman the next morning to explain the historical connotations.

Leniu's admission could potentially shine a light on a broader issue across the game.

After the hearing, Roosters CEO Joe Kelly commended the way Mam and the Broncos handled the incident, but remained adamant Leniu was not racist.

And in turn, he said more education would be provided on the issue.

"We'll increase his education about the Aboriginal and Torres Strait Islander people," Kelly said.

"We'll also be supporting all of our other Indigenous players in the club.

"And across the board, all staff and players will undergo further education of these cultures as well as the Pacific culture."

NRL CEO Andrew Abdo also said the league would work with the players' union on education, adamant the eight-week ban showed the league's tough stance on racism.

"Racism and vilification have no place in modern society and will not be tolerated in rugby league," Abdo said.

"The events of last week go against everything the game is built on.

"We all take great pride in the game's strong links to Indigenous culture, its representation of Indigenous and Pacific Islander players and its ability to meld communities together.

"From this sad event some important lessons can be learned.