Brass and copper inlay is fairly common in continental Southeast Asia, though not usually as elaborate as what you have on your kris. It is common to see a section along the spine that is inlaid with a brass or copper slug (sometimes both, see below), and inlaid writing is also fairly common. Elaborate decorative designs are more often incised or in koftgari, I think.
A dha with brass & copper slugs in the spine:
A dha with inlaid writing on the spine, and also koftgari:
This is the most beautiful inlay I have seen on a dha blade (this one belongs to John "RhysMichael"):
Here is an inlaid date on one of Andrew's:
