Not trying to continue the derailing of this thread but,
Again, the Term Longsword was never used historically. It is a Modern Term. (Modern meaning within the last 100 years)
Also, the weapons that this term was applied to by historians was referring to typically two handed swords. The length and style of what was Considered a "Long Sword", or two handed sword, was some what different between scholars, but most seemed to agree that they were referring to swords that were designed to be used in 2 hands, not 1.
There were a very few scholars that used the Term "longsword" to refer to both 1 handed and 2 handed swords , Often the Blade lengths were similar between these weapons, but only the grip was different between the weapons. It was even noted by a few scholars that dating these weapons was often difficult due to the fact that some Blades were forged in one period and passed down for over a hundred years and had new Handles, some times longer handles other times shorter handles, put on the older blades.
Ewart Oakeshott was one of the foremost of these scholars and created a "Typing" system for swords, instead of using names of swords which he found inconsistent because the same name could be found historically referring to several different types of blades or swords.
So the term "Long Sword" By modern terminology referred generally to all blades of a certain length range which might have been used 1 handed but more specifically and more commonly referred to two handed Swords.
As I mentioned some where else on this forum, perhaps in this thread, RPGs have misused the term Longsword.