Would a fx of the lateral malleolus with partially torn aftl and deltoid ligs and soft tissue injury in joint capsule be described as bimalleor?

Bimal equival. A single fracture of the lateral malleolus with a displaced, torn deltoid ligament can be described as a bimalleolar equivalent. It's not truly a bimalleolar fracture because there is only one "true" fracture, but because of the deltoid injury/joint displacement, it's treated as a more serious ankle fracture injury.
Bi malleolus fx. This term refers. To distal fracture of fibula and tibia fracture.