He met Mr. Sandler in 1963, when they both appeared at the Dunes Hotel in Las Vegas in “Casino de Paris,” a revue imported from France. Mr. Sandler, a Belgian who was born Lucien Santele in 1933, had come from Europe with the show. Singing casually together between performances, the two became friends and hit on a formula they thought might work for them:  Since Mr. Sandler spoke many languages, they would blend Mr. Young’s English lyrics to a song with Mr. Sandler’s version in the original language. They also worked out routines in which Mr. Sandler sang one song in one language and Mr. Young sang a different song in another language as a countermelody. Others used similar techniques on occasion, but Sandler & Young turned a gimmick into a trademark, applying it often to romantic and inspirational material like “Dominique,” “For All We Know,” “C’est Si Bon” and a combination of “I Believe” and “Ave Maria.”  In their first engagement in a Las Vegas lounge, they were discovered by the comedian Phil Silvers, who urged the singer Polly Bergen to use them in her act at the Thunderbird Hotel. They were a quick success and became one of the most popular nightclub acts in show business.  Their recordings made them as well known in Europe as in the United States. Tony Sandler became an American citizen in 1971.  From the early 1960s the duo appeared on variety shows hosted by Johnny Carson, Red Skelton, Andy Williams, Merv Griffin, Mike Douglas, Dean Martin and Milton Berle, as well as Ed Sullivan.  Mr. Young is survived by his wife, Arlene; six children, Dr. Neil Young, Arleen Young, Ron Young, Guy Goldstein, Lauren Goldstein and Rachel Diaz; and eight grandchildren.  When he turned 65 in 1983, Mr. Young retired from the act to spend more time with his family in Palm Springs and Los Angeles. But he continued to perform solo engagements, mostly in Southern California. Mr. Sandler, two decades younger, is still active, singing American and European repertory in an act called “Chevalier: Maurice & Me.”  In 2003 Mr. Young teamed up once again with Mr. Sandler for a concert in Palm Springs to commemorate the 9/11 attacks.  A version of this article appears in print on , on Page C10 of the New York edition with the headline: Ralph Young, 90, Sandler & Young Singer. Order Reprints| Today's Paper|Subscribe
Mr. Young was a singer best known as the English-language half of the popular multilingual duo Sandler & Young.