T'viir al Hruun translates to "snake's tongue" or "dragon's tongue", depending on the translator of this old dialect. It was the sword of Kumar al Dsch'vaani, an extraordinary man about whom many stories are told. It is said this sword would cut through any armor and even the slightest cut would kill a man like the bites of a hundred snakes.
The sword was inspired by images of Zulfiqar. It's a beautiful example that we don't need to look to fantasy to find extraordinary weapon designs.
Check out the Artstation post for more info: https://www.artstation.com/artwork/rAy4W2