<p>Even though I'd not participate in those sites as I'm no where near fluent in anything but English, I think after a period of time — another <a href="http://meta.stackexchange.com/q/26491/54262">6-8 <s>weeks</s></a> months? — to let Ask Ubuntu establish itself, those could be tried and might be successful.</p>

<p>However, I hesitate to fracture the community.  It's been pointed out here (comments on another answer) and elsewhere (including meta.SO; don't ask me where, but please comment with links), it can be better to have more people communicate, sometimes poorly, in English rather than never get an answer because it's on a separate site.</p>