std::basic_filebuf<CharT,Traits>::imbue (3) - Linux Manuals
virtual void imbue( const std::locale& loc )
Changes the associated locale so that all characters inserted or extracted after this call (and until another call to imbue()) are converted using the std::codecvt facet of loc.
If the old locale's encoding is state-dependent and file is not positioned at the beginning, then the new locale must have the same std::codecvt facet as the one previously imbued.
loc - the locale to imbue the stream with
This section is incomplete
Reason: no example
imbue changes the associated locale
imbue (public member function of std::basic_ios<CharT,Traits>)