NAME

       I18N::LangTags::Detect - detect the user's language preferences

SYNOPSIS

         use I18N::LangTags::Detect;
         my @user_wants = I18N::LangTags::Detect::detect();

DESCRIPTION

       It is a common problem to want to detect what language(s) the user would prefer output in.

FUNCTIONS

       This module defines one public function, I18N::LangTags::Detect::detect().  This function is not exported
       (nor is even exportable), and it takes no parameters.

       In scalar context, the function returns the most preferred language tag (or undef if no preference was
       seen).

       In list context (which is usually what you want), the function returns a (possibly empty) list of
       language tags representing (best first) what languages the user apparently would accept output in.  You
       will probably want to pass the output of this through I18N::LangTags::implicate_supers_tightly(...)  or
       I18N::LangTags::implicate_supers(...), like so:

         my @languages =
           I18N::LangTags::implicate_supers_tightly(
             I18N::LangTags::Detect::detect()
           );

ENVIRONMENT

       This module looks at several environment variables: REQUEST_METHOD, HTTP_ACCEPT_LANGUAGE, LANGUAGE,
       LC_ALL, LC_MESSAGES, and LANG.

       It will also use the Win32::Locale module, if it's installed and IGNORE_WIN32_LOCALE is not set to a true
       value in the environment.

SEE ALSO

       I18N::LangTags, Win32::Locale, Locale::Maketext.

       (This module's core code started out as a routine in Locale::Maketext; but I moved it here once I
       realized it was more generally useful.)

COPYRIGHT

       Copyright (c) 1998-2004 Sean M. Burke. All rights reserved.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl
       itself.

       The programs and documentation in this dist are distributed in the hope that they will be useful, but
       without any warranty; without even the implied warranty of merchantability or fitness for a particular
       purpose.

AUTHOR

       Sean M. Burke "sburke@cpan.org"

perl v5.38.2                                       2025-07-25                      I18N::LangTags::Detect(3perl)