After using and watching the forum for a few days, something came up to my mind. I'm wondering if it should be re-ordered so that the English posts be first. Since it's the intl language and that it will most likely be the language the most popular, it could make sense to have it first. At least, checking most forums at there, it seems to be what they are doing.
On the other hand, it's fully a personal choice. So a flag in the user profile could be an idea as well.
What do you think?