I recently read that the name limey goes back to the time of the seafaring adventures and the use of food that prevented the mariners of getting a skorbut disease. The Britains mostly ate limes or drank lemon juice (The Limeys), while the most Germans ate herbaceous stuff (The Krouts). But it was very late, that I could read it and asked myself 100-times what the movie has to do with fruits lol. I wasn´t aware of that it just means a British person. In France they translated it.