A customer went berserk after spotting a bilingual menu at a Mexican restaurant in Southern California.

Security cameras captured the man as he ranted at employees and raged against other customers as he threatened to call immigration authorities, reported WPTV-TV.

“It’s says it in Mexican, we’re not in Mexico,” the man can be heard saying in the video. “We’re in America, not Spanish.”

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The owner of Palapas Tacos in Anaheim said the man became enraged because the menu showed one special was available only on Friday — identified in Spanish, as Viernes — although other signs in the restaurant spelled out the English word.

“I’m an American!” the man bellowed. “I don’t do Spanish.”

Another customer urged him to go elsewhere for a hamburger or hot dog, and he threatened to call U.S. Immigration and Customs Enforcement on the restaurant’s owner.

“Because you’re not legal!” the man says.

“This is over a taco,” said owner Juan Del Rio.

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Del Rio said the cashier was visibly shaken by the incident, and he said the customer seemed like a miserable man.

“I honestly don’t know if he is racist, he hates Mexicans or hates his life,” Del Rio said.

A cook who was on the receiving end of the man’s rant said he was shy about speaking English on camera, but he tried to defend his work in Spanish.

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“One works honorably,” said cook Ruben Velasquez. “We don’t take the bread out of anyone’s mouths.”