Here's how you play Garena's 1.2.0 in English.

gistfile1.txt

1. Install PoE, garena client, register, etc. You should be able to do this.

2. Navigate to C:\Program Files (x86)\GarenaPoETW\GameData\Apps (or wherever it's installed to)

3. You should have POETW folder there. Rename it to POETW2

4. Create new folder, name it POETW

5. Drop this file: pathofexile.exe https://mega.co.nz/#!hJ9VmIBY!uRJFKdTAXjuKsq6Kk1TA7tdjSpFZ03XgJrBl1KWosjY to POETW

6. Launch PoE via Garena client, it should be in English now. Enjoy idling in queue!

Here's the source for pathofexile.exe:

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
	char command[4096] = {0};
	sprintf(command, "cd ..\\POETW2 && PathOfExile.exe %s --language english", argv[1]);
	system(command);
}

If you don't trust my binaries you can compile it yourself, any C compiler should do.

Can't you just make a .bat file to launch it with that command, shouldn't have to bother with an exe.

It should be named pathofexile.exe, I don't think if you renamed .bat to .exe it'll still work.