World and folk music offerings at Spoleto Festival USA are getting a small switcheroo, according to General Director Nigel Redden.

Two weeks after announcing that the husband-wife banjo artists Bela Fleck and Abigail Washburn would present separate concerts at the spring festival, the couple have withdrawn, citing family reasons. Fleck had been slated to perform with Malian singer Oumou Sangare.

They will be replaced by the Grammy Award-winning, Benin-born Angelique Kidjo and the indie-rock duo Johnnyswim.

Kidjo mixes African, European and American styles to produce an energetic, multi-language vocal pop that’s got broad appeal. She will perform in the TD Arena on May 30.

Johnnyswim is a Los Angeles-based husband-wife team — Abner Ramirez and Amanda Sudano — who, armed with a guitar, offer a melodic blend of soulful pop. They will perform in the College of Charleston Cistern Yard on May 31.

Go to www.spoletousa.org for more information and tickets.