Yeah, but how are those files created? How are they available to use in Opera's interface? How are the language files created? You didn't answer to the point. I just would like to know how the languages are listed in the dropdown because I want that lao language is listed in the dropdown,too. There're Thai, Vietnamese... but no Lao. How do they add those languages? Who add them? Involving in translation? If so, I can translate.
I'm working locally using WampServer, not online yet because my website is not yet finished. So no live url for you to view. However, I've tested with Google Chrome and Firefox locally. It works well.