Not a sword, but check out this spear called a
Lefoantsoro.
The spear's from the Mikea "tribe" of SW Madagascar.
I posted this thread last February. The spear is being used as a prop at the Cleveland Botanic Garden. Last time I was there, it was half buried. Since the exhibit is really more about Malagasy plants than about Malagasy spears, it was to be expected. Still, I'd be happy to have one of those spears, if someone happens to bring a spare back.
F