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Locale::Language

Section: Perl Programmers Reference Guide (3)
Updated: 2001-09-21
Index Return to Main Contents
 

NAME

Locale::Language - ISO two letter codes for language identification (ISO 639)  

SYNOPSIS

    use Locale::Language;

    $lang = code2language('en');        # $lang gets 'English'
    $code = language2code('French');    # $code gets 'fr'

    @codes   = all_language_codes();
    @names   = all_language_names();

 

DESCRIPTION

The "Locale::Language" module provides access to the ISO two-letter codes for identifying languages, as defined in ISO 639. You can either access the codes via the ``conversion routines'' (described below), or via the two functions which return lists of all language codes or all language names.  

CONVERSION ROUTINES

There are two conversion routines: "code2language()" and "language2code()".
code2language()
This function takes a two letter language code and returns a string which contains the name of the language identified. If the code is not a valid language code, as defined by ISO 639, then "undef" will be returned.

    $lang = code2language($code);

language2code()
This function takes a language name and returns the corresponding two letter language code, if such exists. If the argument could not be identified as a language name, then "undef" will be returned.

    $code = language2code('French');

The case of the language name is not important. See the section ``KNOWN BUGS AND LIMITATIONS'' below.

 

QUERY ROUTINES

There are two function which can be used to obtain a list of all language codes, or all language names:
all_language_codes()
Returns a list of all two-letter language codes. The codes are guaranteed to be all lower-case, and not in any particular order.
all_language_names()
Returns a list of all language names for which there is a corresponding two-letter language code. The names are capitalised, and not returned in any particular order.
 

EXAMPLES

The following example illustrates use of the "code2language()" function. The user is prompted for a language code, and then told the corresponding language name:

    $| = 1;    # turn off buffering

    print "Enter language code: ";
    chop($code = <STDIN>);
    $lang = code2language($code);
    if (defined $lang)
    {
        print "$code = $lang\n";
    }
    else
    {
        print "'$code' is not a valid language code!\n";
    }

 

KNOWN BUGS AND LIMITATIONS

*
In the current implementation, all data is read in when the module is loaded, and then held in memory. A lazy implementation would be more memory friendly.
*
Currently just supports the two letter language codes - there are also three-letter codes, and numbers. Would these be of any use to anyone?
 

SEE ALSO

Locale::Country
ISO codes for identification of country (ISO 3166). Supports 2-letter, 3-letter, and numeric country codes.
Locale::Script
ISO codes for identification of written scripts (ISO 15924).
Locale::Currency
ISO three letter codes for identification of currencies and funds (ISO 4217).
ISO 639:1988 (E/F)
Code for the representation of names of languages.
http://lcweb.loc.gov/standards/iso639-2/langhome.html
Home page for ISO 639-2.
 

AUTHOR

Neil Bowers <neil@bowers.com>  

COPYRIGHT

Copyright (C) 2002-2004, Neil Bowers.

Copyright (c) 1997-2001 Canon Research Centre Europe (CRE).

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


 

Index

NAME
SYNOPSIS
DESCRIPTION
CONVERSION ROUTINES
QUERY ROUTINES
EXAMPLES
KNOWN BUGS AND LIMITATIONS
SEE ALSO
AUTHOR
COPYRIGHT




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