Language codes for new languages in 2.3

The Lightroom SDK guide lists the language codes for TranslatedStrings.txt files on pages 100 (for web gallery plug-ins) and page 132 (for all other plug-ins). The documentation describes four language codes, but with version 2.3, we're adding several more supported langauges. If you want to localize your plug-in into the new languages, here is an updated list of language codes you can use:

* de: German
* en: English
* es: Spanish
* fr: French
* it: Italian
* ja: Japanese
* ko: Korean
* nl: Dutch
* pt: Portuguese
* sv: Swedish
* zh_cn: Chinese (China)
* zh_tw: Chinese (Taiwan)