ModelCheck can rename features in the modeltree with "PRT_DATUM_RENAME / ASM_DATUM_RENAME", he can also rename layers with "PRT_LAYER_MOVE / ASM_LAYER_MOVE" command.
In my company, old models have orientations in German. In our new templates, we did put them in english.
However, It would be a good thing to implement a feature that allows to rename the orientations with ModelCheck. This way old models can be entirely "cleaned" with modelcheck out-of the box possibilites.