Albion have reached an agreement to sign Türkiye international midfielder Okay Yokuşlu on a three-year contract.
The 28-year-old, who departed La Liga side Celta Vigo earlier this summer, impressed at The Hawthorns during the second half of the 2020/21 Premier League season, making 16 appearances for the Baggies.
Yokuşlu has earned 39 caps for his country, including three appearances at EURO 2020, and will arrive in the Black Country on receipt of a work permit.
Baggies boss Steve Bruce said: “I am delighted we have have been able to secure a player of Okay’s quality. Having already been able to sign Swifty and Jed this window, I’m really pleased the club have shown further intent by bringing in Okay.
“The middle of the park is an area in which I felt we needed more quality and from what I have seen of him, Okay certainly offers that in abundance. I know he is a fans’ favourite following his first spell at the club and I’m confident he will shine for us again this season.
“I must applaud the club for reacting quickly to an ever-changing situation. Ron and the staff behind the scenes have worked tirelessly to seal Okay’s signature.
“We faced fierce competition from some big clubs across Europe, but the player made it clear he wanted to return to the Albion, and he has his sights set firmly on the Premier League. We really are delighted to have him.”