This is not a command the end user would want to run. Ever.
This documentation is meant for people who are studying the
Porcelain-ish scripts and/or are writing new ones.
The 'git sh-i18n scriptlet is designed to be sourced (using
.) by Git’s porcelain programs implemented in shell
script. It provides wrappers for the GNU gettext and
eval_gettext functions accessible through the gettext.sh
script, and provides pass-through fallbacks on systems
without GNU gettext.