gettext: eval_ngettext Invocation

 
 15.5.12.7 Invoking the ‘eval_ngettext’ function
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      eval_ngettext MSGID MSGID-PLURAL COUNT
 
    This function outputs the native language translation of a textual
 message whose grammatical form depends on a number, performing
 dollar-substitution on the result.  Note that only shell variables
 mentioned in MSGID or MSGID-PLURAL will be dollar-substituted in the
 result.