Mmmmm if you want some inputs
IMHO your yataghan is Ottoman Turkish, the silver work is Ottoman Turkish, the hilt and the scabbard smell a bit North Africa...
There is nothing South-East Asian here, sorry.
It's another story for the other one
http://www.vikingsword.com/vb/showthread.php?t=5955
No problem here with a South East Asian attribution
If you turn your photo, you will see Arabic script on your blade.