Duolingo CEO Luis von Ahn has said that he may be forced to move his billion-dollar tech company to Canada if strict U.S. immigration policies persist.

The language learning organization currently employs more than 300 people in its Pittsburgh-based office.

Von Ahn took to Twitter to express his concerns, and suggest that uprooting to Toronto might soon be on the cards.

I'm proud that @duolingo, the most valuable startup in PA, is seen as an inspiration for Pittsburgh. Unfortunately, if the US policies against (extremely qualified) immigration continue, we'll be forced to move jobs (and inspiration) to Toronto @SenToomey @SenBobCasey @billpeduto

— Luis von Ahn (@LuisvonAhn) July 6, 2020

"Unfortunately, if the US policies against (extremely qualified) immigration continue, we’ll be forced to move jobs (and inspiration) to Toronto,” the CEO said.

In reply to the Tweet, many Canadians said that they would welcome Duolingo to the country with open arms.

Come to #TorontoTheGood where we have one of the best tech communities anywhere with the most talented people

— Roy Pereira (@roymap) July 6, 2020

Others pointed out that Toronto is one of the most diverse cities in the world.

We here in Toronto would happily welcome you! Toronto is an incredibly linguistically diverse city, with well over 100 languages used at home. @duolingo would fit right in!

— Nathan Sanders 🏳️‍🌈 (@ludling) July 6, 2020

Last month, U.S. President Donald Trump signed an order which banned many highly skilled immigrants from acquiring visas until the end of the year.

These included the H-1B Visa, which is popular among international computer programmers. 

At the time, Duolingo shared a statement voicing concerns about how the tight restrictions might impact their business.

“As immigration laws continue to become more restrictive or create more uncertainty, we are seeing a trend where foreign workers prefer to work in countries with more favourable immigration policies," said the company's vice president of people, Christine Rogers-Raetsch.

Rogers-Raetsch added that, as a result, they are: “concerned about the future of entrepreneurship in the United States."