One would assume a Russian aircraft would have Russian Cyrillic
lettering.

Given that the Su-30MK is designed for the export market, and even has some
non-Russian avionics, this does not follow. Once you have multi-function
displys, it makes sense to program them in the operator's alphabet and
language.
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Tom Schoene Replace "invalid" with "net" to e-mail
"If brave men and women never died, there would be nothing
special about bravery." -- Andy Rooney (attributed)