The controls config menu is a bit special since it requires that all strings used in that screen have sequential XSTR ids. The strings you are seeing are those added by the SCP which are not present in the retail strings.tbl and are also not translatable. The controls XSTRs start at 507 and go up to 613. However there is a gab of 6 free ids after that so at least that many strings could be made translatable.
To be honest, that code really needs to be rewritten so it just uses the standard XSTR functions so maybe I'm just going to do that.
So, the final answer to your question is this: No, they cannot be translated at the moment. The engine first needs to be changed to allow that.