Ron, for an online dictionary of Malay, you might find Wilkinson a bit more useful:-
https://archive.org/stream/aeg2034.0...ge/n5/mode/2up
but I can't find 'lanteh' in either Wilkinson or Cowie.
I'm sorry, but I cannot discuss these keris-like objects, as I know nothing about them. It was the strange language and seemingly garbled terminology that caught my eye, and I wondered where Amuk had sourced it from.
Unless he sees fit to answer, I guess we'll be wondering forever.
Detlef
No, Amuk is not Sundanese, but he did live in West Jawa from, I think, about 2003. Not quite sure where he is at the moment, but probably still in Indonesia.
He is actually a very multi-talented man.