i want a/one kilo rice - should be accepted.
This is still not fixed.
You can just as well say "one kilo of X" as "one kilogram of X" in English
that's a lot of rice!
Brazilian packages come in 5 kg. It's everyday food.
And when they say every day they mean every day. With the same sauce (feijão) too. I'm getting sick of that stuff
I have Asian connections and we buy 50 pound bags and keep it in a rice silo.
Does Portuguese just not use the letter "k"?
No, except for foreign words and measurements.