On the other hand, pressures are given in Lb/sq. in
Aviators need to be bilingual. Fuel is delivered in litres, the fuel gauge reads in gallons or pounds (in the types I flew), distances may be feet, metres, miles (nautical of course) or kilometres, aircraft weights may be pounds or kilograms. The Gimli glider (767) was a result of the attendant confusion.
https://en.wikipedia.org/wiki/Gimli_Glider