In our school, we do not learn a sword form. I can only explain that my sigung's focus was on traditional southern weapons. He was extremely well-known and respected in Hong Kong for his weapons.
I love broadsword forms. Most I have seen do all seem to follow similar northern influences. I think if you study China's statesmanship history from a geographical standpoint, this becomes obvious. Maybe Hak Ga's didn't have need of swords. We do have other long pointy things and some short sharp ones!
East River Dragon Style, Lam Family
東河龍形 - 林家拳, 林志平,師傅