If you want something really, really odd in that direction, try Bruce Macdonald's Pontypool, which I watched this evening. Some sort of virus causes random English words (particularly endearments) to become infected, start looping, and turn people who understand them into ravening Maenad-like zombie berserks. The protagonists, a talk-radio host and his producer, first try to insulate themselves by speaking only in shitty Ontario grade-school French; when that doesn't work, they try to induce deliberate aphasia in each other by reassigning word-meanings: "Kiss is kill." "Kill me!"