Gettext/eval 005fngettext-Invocation

From Get docs

15.5.12.7 Invoking the eval_ngettext function

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.