After hours of typing, one highly frustrating power cut and probably contracting RSI; I've made a mod that reverts all unit names and faction names back to as they were in vanilla Rome and all new units are given Anglo/Traditional names like vanilla Rome has.
What I mean by traditional is that units like Perioikoi Pikemen (Greek troops) have not been translated, as they weren't in vanilla Rome. The same goes for Equites etc.
Latest version for :
DEI 1.05
08/07/2015
Features :
Restores Faction Names
Restores Unit Names
Installation :
Drop in your data folder and put above DEI in Mod Manager if you use it. Simples.
Steam Workshop :
DEI Faction + Unit Names restored [English]
Manual Download : (depreciated as of 1.03)
DEI Faction + Unit Names restored [English]
Thanks to JFC for something to work from.
This submod is now also available as part of the DeI Official Submod Collection on Steam.