One tactic for resolving this example is taken in Poland, the place CEE 7/five sockets are typically mounted in pairs, the higher (upside-down) one acquiring the "French" polarity along with the lower just one getting the "Czech" polarity, so which the person can pick out what to plug the place. https://simonoojex.blogsvirals.com/28887836/5-simple-statements-about-types-of-plug-tops-explained