He may not watch Hockey Night in Canada, speak French, or understand the allure of a Tim Horton's, but Warren Buffett was an honorary Canadian the other day.

In a visit to Toronto on Wednesday to promote the launch of Business Wire in Canada, Buffett sang the praises of the Canadian dollar, commonly known as the loonie, which has risen sharply against the U.S. dollar in the past year.

His holding company, Berkshire Hathaway, "owned the Canadian dollar," Buffett said in an interview with the Financial Post. "We made several hundred million dollars.... I wish I kept them."

Buffett, who has been buying shares of U.S. railroad companies, also told the newspaper that he was impressed with the Canadian National Railway.

"You've got some good railways," he said. "Canadian National probably has the best record of any railroad I know of."

Buffett has long been bearish on the U.S. dollar, and in a speech in Toronto, he said, "If our current account deficit keeps running at present levels, the dollar, I think, is almost certain to be worth less five to 10 years from now compared to other major currencies."

Dow Jones initially reported that Buffett had said the dollar was "worthless," an error that Buffett himself corrected in a call to CNBC this morning.

It must have been the accent.