Pseudo-forces in the non-inertial frame cause an apparent change in for instance kinetic energy. And thus, they do apparent work, or "pseudo-work", if you will.
For example, consider standing on roller-skates in a driving bus. In the non-inertial frame of the bus, when the bus brakes you roll forward, as if a pseudo-force is pushing you and accelerating you to speed up and reach higher kinetic energy.
In reality, it is not you who are gaining kinetic energy, but rather the bus that is losing kinetic energy. But in the frame of the bus, it does appear to be you who gain apparent kinetic energy. This must be due to some apparent "pseudo"-work done by the apparent pseudo-force.
Basically, in non-inertial frames, pseudo-forces act and function just like any other force. They can do work etc. just like any other. Their work just is also "pseudo".