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16.5.15.1 Three approaches for Shell Scripts
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   There are three approaches for internationalizing shell scripts.

   The common part is how to internationalize a message without
parameters: This is done through the invocation of the ‘gettext’
program, see *note gettext Invocation::.

   The approaches differ regarding how to internationalize a message
with parameters, that is, what is called "formatted output" in other
programming languages.