Thanks, I already downloaded both versions but I can´t open Root.pfs file from PSVita game, I downloaded psvpfstools but the program don´t open in my computer u.u.
You should be able to copy them from Vitashell by using the "Open decrypted" option. Check what you may need to run psvpfstools on your PC, though the only thing that comes to mind would be the keys, and the encrypted files to make changes. Both of those are detailed on the read me from psvpfstools. Also, you may find
tutorials here or in reddit to extract files from Vita games, too.
Of course, even if you do that, you may find that the files are also encrypted by the devs, besides the Vita's normal encryption method for its files. In that case, you would need to see if the files match with the ones from the PC version. And here comes the hard part: you may need to create an unpacker/repacker for both the PC version and the Vita version, from scratch (unless you somehow get your hnds on the tools used to make the english version, which I don't see happening as its an Steam version; this was not the case with Grisaia, which had a fan translation project, someone known in that business made the tools, and then afterwards came the Steam version).
If the files are encrypted by the devs in the same way, then it's less work for you when making your unpacker/repacker. You'd only need to extract the ones from PC with the english strings (and compare all of the files with the Vita version and see if it needs any changes made; it's not like it's going to work just by replacing some files here and there). You will need an unpacker/repacker for Vita; the unpacker to extract everything and check the file structure, and the repacker to add any changed files you make for it to work.
Truth be told, this isn't easy, and I'm saying this as someone who has worked on projects like this. Sure, having the english translation helps as you only need to replace the strings and make sure everything works correctly, but you would probably need to code your own tools to make a patch, even if you are using the rePatch plugin that may make the process easier (as you would still need to extract the contents of the Vita version to check file structure and see if its the same as the PC version).
Good luck.
