Our only chance is to remove English as an official language of the EU and go back to German or Spanish or French or something else that would increase the cost of mass manipulation

I don’t think it’s our only chance, but it’s definitely a very valid point and something that I’ve been thinking about quite a lot since Brexit. Foreign powers would have a much harder time if people only spoke their native languages, but it’s not something that’s going to change anytime soon. And it would have a lot of downsides too.