They probably thought smoking jackets were much more interesting than dinner jackets and thus adopted them as their standard formal evening wear.
Heck, I would, if I were able to dictate mens' fashion.
My favourite one is the word for "pencil", after the brand name emblazoned on the side of what I can only assume must have been the first pencil in Russia.The Russians do this like crazy, you can read most loanwords phonetically. When I read advertisements or such things, I've learned to read words I don't understand out loud for that reason :-)