Update to Language code#2

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Commits on May 12, 2010

Payment and Shipping Modules not updating for some users
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Commits on Oct 19, 2010

TABLE Languages edited to allow language code longer than 2 characters. Now allows 5 characters, so a language code like zh-CN can be entered.
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Now allows language code to be up to 5 characters, e.g if language code is zh-CN
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