Yes, most of us are Americans here. Many US aircraft were great in reality and are great fun in AH, some are on my favorites list, the P-38G and F4U-1A in my case. Despite that, WWII was a huge, multi-national war and many other nations also provided many great aircraft that are also great fun. In that light, I am going to post a list of units in the game and the percentages that are AH2 standard. For the B-24J and Ki-84-Ia I will count them as half upgraded as they were first goes and in many ways it really shows, the Ki-84's interior cockpit framing looks worse than many AH1 standard models for example. The T-34/76 looks a lot better so will count as fully AH2 standard. I am not going to list individual marks of an airframe as doing one makes it mostly done for the other versions:
United States:
A-20
B-17 (AH2)
B-24 (half AH2)
B-25s (AH2)
B-26
C-47
F4Fs
F4Us (AH2)
F6F (AH2)
Jeep (AH2)
LVTs
M-3
M4 Sherman (AH2)
M-8
M-16
P-38s (AH2)
P-39s (AH2)
P-40s
P-47s (AH2)
P-51s (AH2)
PT-Boat
SBD
TBM
Percentage of distinct units upgraded: 46%
Germany:
Ar234
Bf109s (AH2)
Bf110s
Fw190s (AH2)
Ju87
Ju88
Me163
Me262 (AH2)
Ostwind (AH2)
Panzer IV H
SdKfz (AH2)
Tiger
Whirbelwind (AH2)
Percentage of distinct units upgraded: 46%
United Kingdom:
Boston
Hurricanes
Lancaster
Mosquito
Spitfires (AH2)
Typhoon
Tempest
Percentage of distinct units upgraded: 14%
Russia:
Il-2
Las (Ah2)
T-34s (AH2)
Yaks
Percentage of distinct units upgraded: 50%
Japan:
A6Ms
B5N
D3A
Ki-61
Ki-67
Ki-84 (half AH2)
N1K2 (AH2)
Percentage of distinct units upgraded: 21%
Italy:
C.20s
Percentage of distinct units upgraded: 0%
Comments:
Germany and the US are both looking good and coming along. Russia's percentage looks good because the Russian set is so disproportionately small that having two AH2 standard lines gives it 50% upgraded status. Japan, the UK and Italy all are lagging behind the US and Germany.