Moodle 2.0

Chapter 3
For example, the subdirectory /lang/en_us holds files for the U.S. English
translation, and /lang/es_es holds the files for traditional Spanish
(Espanol / Espana).
The name of the subdirectory is the "language code". Knowing that code can be
useful. In the example above, es_utf8 tells us the language code for International
Spanish is es.
Inside a language pack's directory, we see a list of files that contain the translations:
For example, the file /lang/es_utf8/forum.php holds text used on the forum
pages. This includes text that is displayed to the course creator when creating the
forum, and text that is displayed to the students when they use the forum. Here are
the first few lines from the English version of that file:
$string['addanewdiscussion'] = 'Add a new discussion topic';
$string['addanewtopic'] = 'Add a new topic';
$string['advancedsearch'] = 'Advanced search';
And here are the same first three lines from the Spanish version of that file:
$string['addanewdiscussion'] = 'Colocar un nuevo tema de discusión
aquí';
$string['addanewtopic'] = 'Agregar un nuevo tema';
$string['advancedsearch'] = 'Búsqueda avanzada';
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