awk
"abc"
_"abc"
dcgettext, missing dcngettext in gawk-3.1.0
TEXTDOMAIN variable
bindtextdomain function
setlocale (LC_MESSAGES, "") in gawk-3.1.0
xgettext
printf "%2$d %1$d" (GNU awk only)
dcgettext, dcngettext and bindtextdomain
yourself.
An example is available in the examples directory: hello-gawk.