It will not be in Google only on English, because Google is crawling your forum - it means Google also goes to translated links. So we have demand for translation and page gets translated.

This is very simple - content will be translated first time when someone will go to the translated page first time. It doesn't matter will it be real person or Google robot. Content is cached. And after cache expires it is flushed and filled again when someone asks for translation of something which is not cached yet.

So when you write your post in English, then it will be translated on demand - when someone will ask for translation. Google will crawl your pages so it will also ask for translation, so it will get translated content and index your translated page. So person who do not know English will find your page by searching in his own language as fast as Google will index the page.

Yes we plan to made more generic tool which would be able to support translations on other environments, but still we have some features which we want to integrate first before we open new line of product. There is no any deadline for this at this moment.