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.

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See also [catclose] and [catopen].
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[Category Command] - [Category Local]