This guide will show you how to remove about 20GB of unnecessary language data from the games install folder.
Step 1: Locate the install folder
Find the folder where the game data is installed. For example, my install location is:
D:\SteamLibrary\steamapps\common\Zenimax Online\The Elder Scrolls Online
Step 2: Delete the voice over files for your unused languages
In this folder there are three folders that hold the in-game voice over data. They are labled vo_de, vo_en, and vo_fr. If you are only playing the game in english, then you can keep the folder labled vo_en and delete the two other folders.
This will reduce the games folder size by about 20GB!
Step 3: Profit
Now go enjoy playing ESO with more space on your hard drive!
Before:
After:
By Akatosh001