They keep failing to see this, while CUDA is a polyglot programming model, a couple of years ago at an OpenCL conference (IWOCL), someone asked the panel when Fortran support was going to happen.

Everyone on the panel reacted surprised that it would be something that anyone would want to do, and most of the answers were the kind of talk to us later.

Meanwhile PGI was shipping Fortran for CUDA, this was before them being acquired by NVidia.