Description:
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When using the Camino Browser, under Mac OS 10.5.2, and browsing the php.net functions ie. http://www.php.net/preg_match, by default the headings are shown in the zh-Hans or zh-Hant language code (Chinese) if they are part of the browser accepted language string.

Reproduce code:
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Browse the PHP.net functions site, with zh-Hans,zh-Hant as part of the accepted language string. e.g. "en-GB,en-US,en,ja,fr,de,es,it,pt,pt-PT,nl,sv,nb,da,fi,ru,pl,ko,zh-Hans,zh-Hant"

Expected result:
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The site to display in the pre-determined language from IP settings, ie. English (en-GB) in this case.

Actual result:
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The site displays the headings in Chinese. Removing the zh-Hans or zh-Hant language codes allow the site to default to the correct language - It seems that these language codes are not recognized correctly by the site, and therefore it sets it as the default language?