It's a Rancor.
Imagine if someone described a Rancor to you, based on Ralph McQuarrie's early sketch design. Imagine that description went through some dubious language translation.
Wouldn't it look something like that?
For reference, here's a copy of that sketch. To me, it's easy to get from this sketch to that image if all you had was a written description that had been translated from English.
Also this early concept art by Joe Johnston shows the tusks:
