nice to hear that you also share buying something an a learning opportunity.
I too do that, and my collector's prowess isn't such that I can call myself an expert specialist when I am rather more a generalist.
I think it was unavoidable that many layers of colonial experiences ( some within Asia itself) left many superimpositions of culture and weapons were no different than anything else.
As for the name, that has to be taken with a large pinch of salt and Portugis may have simple meant " foreign" within this context. I just saw a video of a guy (who has hundreds of videos, and at some point he grabs a Dutch Klewang (could have been a 1811 Hembrug) and calls it a " Portuguese weapon"
https://www.youtube.com/watch?v=zdvsVqh2aws
So maybe this is as Portuguis a weapon as Turkeys are from Turkey... not.
Nevertheless the way is the goal!