### Create Translation Setup File

Source: https://github.com/realityripple/squirrelmail/blob/master/doc/translating.txt

Create a setup.php file for your translation. This file defines the language name and character set used by SquirrelMail.

```php
<?php
/* Klingon translation setup */
$languages['tlh']['NAME'] = 'Klingon';
$languages['tlh']['CHARSET'] = 'utf-8';
?>
```

--------------------------------

### XML Structure for Help Files

Source: https://github.com/realityripple/squirrelmail/blob/master/doc/translating_help.txt

Illustrates the basic XML structure for SquirrelMail help files, showing the placement of tags like <chapter>, <title>, <summary>, and <description>.

```xml
<chapter>
   <title>
      My first chapter   
   </title>
   <summary>
       Just a brief summary
   </summary>
   <description>
       This is a more detailed description that
       can span many lines.  Usually this is the 
       bulk of the help section or chapter description.
   </description>
</chapter>
```

--------------------------------

### Configure Apache for MSIE HTTP/1.0 Downgrade

Source: https://github.com/realityripple/squirrelmail/blob/master/doc/ie_ssl.txt

Configure Apache's httpd.conf to force HTTP/1.0 for MSIE browsers to work around their HTTP/1.1 implementation bugs, specifically for downloading attachments.

```apache
BrowserMatch "MSIE" nokeepalive downgrade-1.0 force-response-1.0
```

--------------------------------

### Fix PHP No-Cache Headers for IE SSL

Source: https://github.com/realityripple/squirrelmail/blob/master/doc/ie_ssl.txt

Redefine 'Pragma' and 'Cache-Control' headers after session_start() to resolve IE SSL download issues. This method works for all browsers.

```php
session_start()
header("Pragma: ")
header("Cache-Control: cache")
```

--------------------------------

### Compile Translated PO File

Source: https://github.com/realityripple/squirrelmail/blob/master/doc/translating.txt

Convert a translated .po file into a binary .mo file using msgfmt. This binary file is used by SquirrelMail for translations.

```bash
msgfmt -o squirrelmail.mo squirrelmail.po
```

--------------------------------

### PHP Translation Strings

Source: https://github.com/realityripple/squirrelmail/blob/master/po/independent_strings.txt

Demonstrates the use of the `_()` function for defining translatable strings in PHP. These strings are typically used for content originating from external sources.

```php
<?php


/**
 * independent_strings.php
 *
 * Copyright (c) 1999-2026 The SquirrelMail Project Team
 * Licensed under the GNU GPL. For full terms see the file COPYING.
 *
 * The purpose of this module is to store translation strings that
 * are not into the code. For example strings that can come
 * through an external source like emails.
 *
 * $Id$
 */


_("Delivery error report");
_("Undelivered Message Headers");

/* The string for unsafe images */
_("This image has been removed for security reasons")


?>

```

--------------------------------

### Merge New Strings into Translation

Source: https://github.com/realityripple/squirrelmail/blob/master/doc/translating.txt

Merge new strings from the SquirrelMail template (.pot file) into an existing translation (.po file). This command updates the translation file with new strings and comments out obsolete ones.

```bash
msgmerge squirrelmail/locale/language/LC_MESSAGES/squirrelmail.po \
squirrelmail/po/squirrelmail.pot > \
squirrelmail/locale/language/LC_MESSAGES/squirrelmail.po.new
```

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