How to rename Greek to English tags and filenames

Hello,
Firstly i want to thank you for this program!!!
Secondly... I got 30421 songs on a External HDD and half of them have tags and filenames written in Greek. I need to convert Greek characters to English, because a program that i use for broadcasting doesn't recognize Greek fonts and displays the songs like #$$^???']][[]'΄'??.
There is a way (A>a button) where i can replace characters (A Greek to A English, B Greek to B English etc) but this way i have to replace each letter seperately snd when the program is about to process 30421 songs it takes much time. Is there any way that i can replace more than one letter at the same time?
Thank you.

Create an Action that has a bunch of REPLACE commands for each character you want to swap. It'll take a bit of work to set up, but once you've got it you'll be able to modify every filename in your library with a single click.