Catch Kathmandu multilang – Free vs Pro

Hello, We are using Catch Kathmandu free for many years and multilang using Polylang was working fine until recently (cannot tell when it stop working...) The English home page will redirect to default lang (French). All other page translation works OK. I'm willing to purchase the Pro theme. Before i do, I Need the confirmation it will fix this issue before purchasing. Thank you for your help Regards,