**How to change language interface on the client?**
1. Close your League of Legends client and open the game folder
2. Navigate to this folder : "\League of Legends\Config"
3. Find the file: "LeagueClientSettings.yaml"
4. Open the file using a text editor like notepad
5. Look for the line:_ locale: "en_GB"_ and simply replace the _"en_GB"_ with another locale code
**(Optional -- If it still is not working) **
If the language has not been changed yet,
then do all the 5 steps over again and then head back to the config folder,
right click on LeagueClientSettings, open properties and make it read-only
**List of locales:**