Yu-gi-oh! Template Variable Error

I figured out what the problem is and made a stop-gap solution.

The issue is that the Yu-Gi-Oh! template code expects there to be a global setting for what language you're working in, but in version 2.1.2 this setting either has a different name or doesn't exist.
The code which is causing the error wants to know your language so it can set the separator icon (variants of the slash / ) appropriately.

If you only plan on making cards in English, or don't care if your slashes look a little different from the official ones in Chinese or Japanese, you can copy the attached version of the "script" file and paste it into your yugioh.mse-game folder (full directory for the correct folder is \Magic Set Editor\data\yugioh.mse-game\). This forces the program to think you are always using English and it bypasses the check on the faulty language setting.