A private language school in the Croatian capital of Zagreb is using a photo of first lady Melania Trump in its advertising campaign to promote learning English.

Five billboards feature an a photo of Trump speaking at the Republican National Convention during the 2016 election.

"Just imagine how far you can go with a little bit of English," the billboards read.

A spokeswoman for the American Institute in Zagreb told the Associated Press the billboards are not a swipe at Trump.

"There are different opinions about Melania Trump, but the fact is that she is the first lady," Ivis Buric said. "She had to do a lot, including delivering speeches in English and addressing huge crowds in a foreign language."

Trump also speaks her native Slovenian, as well as French, Serbian, and German.