I noticed that in 1915 (in WOFF) I was warned about enemy 'flak'. This word should be changed to 'archie' which is what the WWI RFC pilots used. 'Flak' comes from the German abbreviation for Flugzeugabwehrkanone, or "aircraft defense cannon". 'Flak' was rapidly adopted by the Allies in WWII for obvious reasons, but it was not used in World War One at all. Let's get the immersion right!