catgets is a Tclx command in support of getting messages from a message catalog.
catgets catHandle setnum msgnum defaultstr
Retrieve a message form a message catalog. CatHandle should
be a Tcl message catalog handle that was returned by
catopen. Setnum is the message set number, and msgnum is
the message number. If the message catalog was not opened,
or the message set or message number cannot be found, then
the default string, defaultstr, is returned.See also catclose and catopen.