If you ever need to get the names of a city in the proper spelling and language, then just copy and paste the names we list so that you don't need to have the according keys on your keyboard. Either that, or look up the key codes on the internet. For instance, the German umlauts are typable even on an American keyboard if you hold Alt down and press a set of three numbers:
ö = Alt + 148
ä = Alt + 132
ü = Alt + 129
Of course every thinkable letter from a language using the Roman alphabet can be typed out this way. It's just a matter of finding out the code that activates it.
And I figured I might as well update some things for you, that is if you don't mind. I opened the biq you posted and moved, altered, and revised to make the map more accurate. For the most part, most borders, names (as well as spelling), and city locations have been fixed to be accurate, with the EXCEPTION OF POLAND, RUSSIA, FINLAND, SWEDEN, NORWAY, ROMANIA, UKRAINE, TURKEY, IRELAND, AND ENGLAND. France, Germany, Belgium, Denmark, the Netherlands, Spain, Portugal, Italy, Switzerland, Austria, Czech Rep., Slovakia, and Greece. All other nations remaining nations were left as is.
I'm not saying my version is perfect, but I will be as bold as to say that Germany has been optimized to its best considering the map size. Bremen and Hamurg both have access to the ocean now, despite not lying directly on the coast (just like RL), cities were optimized to fit the map, and the borders won't get any better than they currently are. I didn't touch the populations of any civ since I figure you'll do that with more time.
This is just some fixes I think the map is better off with, by no means do you have to use it now. I think using it plus the suggestions others made for Poland and the UK would make it quite accurate, considering the size of the map.
Here's the updated biq, should you choose to use it.