Why don't you just opt out of receiving a paper copy of your council tax bill and go online only. That'll save you receiving both versions.
Here's a bit of light reading for you about 'Bilingual Cardiff'. Sorry if you feel its a waste of time. I think the progress has been brilliant and long may it continue.
In spite of everyone and everything, we are still here.
https://www.cardiff.gov.uk/ENG/Your-...s/default.aspx