Dunno, as a German, I’d find it ahistorical if everybody was using “Deutschland” … the nation-state as an idea, and a unified nation state, are relatively young. Before that, what we call Deutschland today was a mess. It’s no surprise that romance languages use some or another variation of “Allemagne” … the german dialect spoken around the southwestern border is still called “Allemannisch” even in Germany, same with “Saxon” and the variations “Saksa” to the east …

I kinda prefer it the way it is in this case, honestly …