To You Weebs Out there
Today, I'm going to teach you how to change your voices to Japanese (Or any language for that matter)
Step 1 - Go to your League of Legends folder Contents/LOL/RADS/SYSTEM Step 2 - Click Locale.cfg and open it with any text edit tool you have Step 3 - Change the line from en_US to ja_JP (You can change this back) Step 4 - Open League of Legends and download the game files for Japan
Problems One Problem is that all your text is going to be in Japanese, and if you don't understand Japanese or don't know the game well enough to navigate it without text, I'd recommend changing the text to english; however, I've noticed people have been getting crashing clients, so use it at your own risk. Also you can just look it up in order to change the text, this is just a really brief overview on what to do. So if you really want to
You can change everything to your desired language as long as there is a server that has your desired language.
tr_TR ru_RU pt_BR ro_RO pl_PL ko_KR hu_HU it_IT fr_FR es_MX es_ES es_AR en_GB en_AU el_GR de_DE cs_CZ
Gonna be honest with you, I have no idea what most of these languages are. If it looks close to what you want your desired language to be, just try it, you can always change it back (your LoL folder is going to end up taking a lot of space though). Even though I think there should be no problems, change at your own risk.
EDIT: Thanks to Dorito Pope, I was linked to a very easy way to change your voices and keep the text. Just download LVOC, and change the voices using that. The program does it for you. However, still download at your own risk.