User blog comment:Kogath/Monster Hunter X Discussion/@comment-6050823-20151221011655/@comment-5569775-20151221043645

Well Halberd is likely a lose translation, or maybe they don't know the difference between pole arms. His tail is more similar to a Naginata(due to length of the bladed part) and either a Glaive or a Voulge(due to width and cutting power), depending on your perspective. Regardless his tail is like a pole arm and a halberd is a pole arm, so it should be easy to connect the dots to get what they were trying to say.