Duo Lingo is a website and app that offers free language instruction. It was founded in 2009 by two former employees of Google, Luis von Ahn, and Severin Hacker. The company's mission is to "change the way people learn languages."

WWE and Duolingo, in partnership with the Welsh Government, have launched a Welsh language learning guide for Clash At The Castle.

This marks the first time that WWE has created content specifically for the Welsh language market and is part of the company's commitment to growing its global reach.

The learning guide, which is available on the Duolingo app, will teach fans how to say key WWE phrases in Welsh ahead of Clash At The Castle, which takes place at Caerphilly Castle on September 1.

WWE Superstar Sheamus, who is originally from Dublin, Ireland, said: "I'm really excited to be part of this project. It's great to see WWE working with Duolingo to help fans learn Welsh so they can enjoy our live events even more."

WWE Executive Vice President of International, Gerrit Meier, added: "As WWE continues to expand our global reach, it's important that we create local content that resonates with our international fans.

DuoLingo's approach to language instruction is based on the principle of "gamification." The website and app use a points system, badges, and other elements of game design to motivate users to keep learning. The company has been praised for its innovative approach to language instruction and its effectiveness in helping users learn languages.

DuoLingo is a free service, and it does not sell advertising. The company makes money through a subscription service, DuoLingo Plus, which offers users additional features, such as offline access and unlimited practice sessions. The company has also partnered with companies such as Microsoft and Babbel to offer language instruction to their employees.