As can be read here:
https://www.gnu.org/software/gettext//manual/html_node/Mark-Keywords.html
The _(str) macro is typically defined for a project to abbreviate the
gettext(str) call. Although this is not part of GNU it would enhance the
analysis. Cppcheck often does not know what _() is. In daca@home it is
reported thousands of times as a function without configuration.