WordPress have oEmbed feature, which auto parse video links from popular site. I think that will be worth in your case.

It was existed before but was outdated, you can downlaod outdated one from here Download ap-tr_TR.po. You can update it using poedit.

Please refer this issue to Shareaholic plugin developer, as they are hooking their codes in the content so its appearing everywhere. I hope there may be an option in that plugin to disable their content by post type. this is not a big issue, I hope they already have answer. Cheers.

Hi for first issue, do you check your cache plugins? for second, refresh your single question page. Good luck!

Please do invite system! Need a way to help users invite their friends.

It will work with partial name too (though I will check once).

Here are the function which you can use after inserting question and answer BUT if you importing  using wp_insert_post, then this function get hooked automatically. https://gist.github.com/rahularyan/371f893f1ae5c6e788fc

Install “stop spammer registrations” plugin and that will solve your issue but even though some spammer are able to bypass this.