Well, I am not sure, what is the forklift legislation in Mozambique, but all European standards and regulations I know, proscribe to intervene in forks structure (the forks usually are after surface hardening), and limit the wear to 10%. So every "modernisation" of the forks must be confirmed by laboratory testing in accordance to Machinery Directive and properly certified.
I don't remeber exactly, but one of EN 1757 standards, and ISO 3691 include these erquirements.