Help changing League's in-game language.

[quote=planas]I'm having difficulty changing the language ever since I changed servers to play TFT on NA. I mainly play on LAS and I don't like the spanish voice acting, so I used to change it to english, but now I can't do it anymore. I've tried all the methods I've found, triend creating a shortcut of Leagueclient.exe and adding --locale=en_US but when I open leagueclient.exe it opens an outdated version of the client, which has the language changed but wont let me login. I've tried changing the .yaml file but everytime I enter the client it just changes the file back to es_MX, even if I check the read only box. I've also tried other way where I was supposed to delete the riot client folder and enter through league of legends.exe directly, but this just throws an error and won't even open the .exe. Please I've tried literally anything I've found on the internet and still can't change it. Any tip will help.[/quote]