Mr Trump was responding to an interview he gave to ABC on Wednesday night, where he said he wouldn’t necessarily alert the FBI if a foreign Government offered him information on a presidential rival in the 2020 elections.
The US President wrote ranted on Twitter: “I meet and talk to “foreign governments” every day.
“I just met with the Queen of England (UK), the Prince of Whales, the PM of the United Kingdom, the PM of Ireland, the President of France and the President of Poland.”
We talked about “Everything!” ‘Should I immediately call the FBI about these calls and meetings? How ridiculous!”.
Minutes later, the president changed the spelling to correctly refer to the future British monarch by his correct title, the ‘Prince of Wales’.
Twitter went into meltdown mode, with scores of whale memes being posted in reply to the US president’s gaffe.
One Twitter user wrote: “Too late. Internet is forever. PRINCE OF WHALES!”
Too late.— Barbara Marshall (@babsmarshall1) June 13, 2019
Internet is forever. PRINCE OF WHALES!
"Don't listen to that usurper, Donald. I am the true Prince of Whales. I have the real Biden dirt. He once peed in the ocean. I saw it with my own eyes!" - Prince of Whales pic.twitter.com/h8YarMh33X— Jeremy Newberger (@jeremynewberger) June 13, 2019
But another jumped to his defence, saying: “Mr. President don't worry about these fools.
“They hate you so much they're inventing crimes nobody has ever heard about!
You're aware the Royal Family aren't a "foreign government", right?— Phil (@philintheuk) June 13, 2019
“They grandstand on xenophobia and then they say talking to foreigners is a crime. These people are sick!”
One Twitter user simply said: “The Internet remembers things better than you do.”
The Internet remembers things better than you do. pic.twitter.com/P9hb3bOYwq— Doktor Zoom (@DoktorZoom) June 13, 2019
His latest grammatical error comes despite Mr Trump’s state visit to the UK this month, where he was invited as a guest of the Queen to a state banquet at Buckingham Palace.
Mr Trump spent time with Prince Charles during a ceremonial Guard welcome.
He posed for photos and talked extensively with the Prince of ‘Wales’ during his visit.
The US president has often been pulled up for his language and grammar on Twitter.
Perhaps his most famous gaffe was when he spelled “coverage” as “covfefe”on May 31, 2017 - causing a Twitter meltdown over the meaning of his typo.
The tweet, which was liked and retweeted hundreds of thousands of times, read: "Despite the constant negative press covfefe.”