@Miguel has a good question, relating to post translation:
Should we translate titles into both languages, or keep only the original language?
And if we do have two languages, how should we format them?
I have posted a number of possible answers below, so they can all be voted up/down. I honestly think some of them are really bad ideas, so hope they will be voted down; so please do so with impunity. :) And also please provide your own answers, if you have alternate suggestions!