The RTRs' purpose is to reverse the language so that all prayers, magick they do, will have a reverse effect. If a prayer protects them, the RTR exposes them and destroys their protection.
RTR stands for "Reverse Torah Ritual". One in which we just change the letters would help in no way our cause.
These riuals are carefully engineered by our High Priests and Priestesses in assistance and accordance of our Gods, some even given in full by the Gods themselves.
If your idea was to do the current RTRs with the mentality that it's their front language, then this is a good idea. However, don't change the way the current RTRs are, as there is yet no need to.