Did you know that I'm going crazy everytime I play a game without original voices? (Lucky at least Wonderful 101, really a great game, have the switch in the settings menu).
However, if inside the folder there is all those voice, I was asking my self if itsn't faster to mod only cos.xml forcing the region? It should start with the choosen region. (I've tryed it with Loadiine in the past, so it should work for installed games). Something like this : "<argstr type=”string” length=”4096″>main.rpx -region EUR</argstr>".
This is only a "workaround" in mind mind. Doesn't means it will work.
Yesterday I was searching a way to "switch" the language to Japanes for Sonic & All start Racing Transformed without all those mods (decrypt, mod, encrypt ecc ecc). Maybe with Cafiine it can be done easily ... but you must have your PC running.
However thank you a lot, this help me a lot to implement my idea