How can i download castle clash en version?
If we are talking about Android version you have 2 options:
1. Go to Google Play store, and download from there, or
2. Download and install apk from here: Android-EN 1.7.81: https://bit.ly/CCEN1781
Just remember you must allow to install apk from unknown sources, which will be prompted when you will try to do it.
If we are talking about different platform than it looks little differently, but still you need to go to app center or store and install from there.