If he is using your Steam account then he most likely changed the store region to France, on Steam click on your name at the top right and go to account details, at the top you will see store region, change that to United Kingdom (£), Steam will only change the currency if you change the region, it does not change automatically based on where you're connecting from, this is mostly due to some people like to use VPNs which can spoof their location, this helps prevent DDOS attacks if you're a streamer.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.