While of only published online in english so far, if the goal was to contribute to the growth of some community in terms of nationality (let's face it, thw natively-english community is strong because of the amount of info in english out there on the webs too), I would write it in my native language.
Perhaps this can help put things in perspective, but there's more tutorials in english (at least in the west) on the internet more than any other language. And I think that kids that know english have an advantage with that, they can start coding sooner on their own (i.e. googling) without having to go through the step of learning english first.
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