The map below shows European capital cities together with their names in the local languages (all possible variants are shown in countries with several official languages or spelling variants of the name). If one of the variants is spelled the same as the usual English name, the country is green. If it is spelled differently, it is red, and if it is spelled essentially the same but in a different script, it is blue:
The capitals of the microstates Liechtenstein, Monaco, and San Marino are not shown on the map to avoid confusion. They are “Vaduz”, “Monaco”, and “San Marino”, respectively (all of them are spelled the same as in English).