Riemannian geometry is an example of a biscalar geometry.
Riemannian geometry is an analytic geometry based on the metric tensor.
Also, Kahlerian geometry seems to be limmited by the assumption that the exterior derivative of the first fundamental form vanishes. The interpritation of the mathematics of the two geometries is different, but biscalar geometry might just be another form of Kahlerian geometry. Biscalar geometry is a Finsler Geometry.