Why are the names of the 35 confession Buddhas not in Sanskrit?

Hello, I'm planning to start the practice of prostrations to the 35 confession Buddhas and got the practice material from FPMT. I noticed that all the names of the Buddhas are translated (either in Tibetan or English), why is that? I've always heard that keeping the Sanskrit is important for mantras and names, so it was very surprising to see that these are translated. This is just a minor curiosity on my part.