"Can I set search priority like that in FTM 2012 itself?"
If by that you mean in "options", no. You set it in the web browser plug-in that is the Search workspace that we've been discussing. Unfortunately, this just affects your search results, not the "hints" that take the form of those leaves.
Note: there is an option not only for "English" but a broader one for "UK and Irish", which you might try if the English doesn't seem to be working properly.