I think you should draw one nice version of your flags and then copy paste it as needed. Pixel art could give something nice and recognizable without requiring too much work. Also the PLA has a different flag than the PRC's. Same thing for the Red Army.
" 1Junko lost " lol.
You misspelled Volkssturm, if that's what it was supposed to mean.
That sounds like a good idea. As for the flags, I just used the nation flags--- the correct imperium flag would also be different.
Anyways, the in-universe reason for the misspelling is that they simplified the word. The out-of-universe one is that I was going off memory and screwed up.