viet-encode-viqr-region
viet-encode-viqr-region is an interactive autoloaded Lisp function in `viet-util.el
'.
(viet-encode-viqr-region FROM TO)
Convert Vietnamese characters of the current region to `VIQR' mnemonics.
When called from a program, expects two arguments,
positions (integers or markers) specifying the stretch of the region.