Wilson, who has a habit of finishing second, shot 5-under-par 65 for a three-round total of 13-under 197, a shot better than Lin Wen-tang (64). Langer had 63 and was two back of Wilson.
Seeking his first win on the European Tour after eight second-place finishes, Wilson was the only player among the four co-leaders after the second round to shoot in the 60s in the third round.
"Like I keep saying, if I can keep getting up there, I'll break through eventually," said Wilson, who would improve his chances of qualifying for the 2009 Masters Tournament with a victory. He's 42nd in the Official World Ranking and the top 50 at the end of the year earn invitations.
The 51-year-old Langer, a two-time Masters Tournament champion, hasn't won on the European Tour since 2002.
"It was kind of a very strange day," Langer said, adding he wasn't surprised to be on the leaderboard because he's won four times on the senior circuit this year.
Eight-time European tour Order of Merit winner Montgom-erie also played solidly, recovering from a double bogey on the first to shoot 70. He sits in eighth place, one shot behind Pablo Larrazabal (64), Rory McIlroy (66), Francesco Molinari (67) and Jeev Milkha Singh (66) at 10-under.
JAPAN GOLF TOUR: In Miyazaki, Japan, Prayad Marksaeng shot 4-under-par 67 to take a two-stroke lead at the Dunlop Phoenix tournament.
Marksaeng birdied the first and last holes at the Phoenix Country Club, and had three birdies and a bogey in between to finish the third round at 8-under 205, two strokes ahead of second-round leader Tomohiro Kondo.
Kondo had 70 and is two strokes ahead of Brandt Snedeker (70), and Ryo Ishikawa (70) and Masaya Tomida (69).
Defending champion Ian Poulter shot 66 for the day's best score, but still trails by seven shots.