I'm from the UK, but my website has a worldwide audience.
What's the best (in your opinion) choice when it comes to spelling?
"Thank you for your enquiry"
"Thank you for your inquiry"
I've used the first one as this is mostly accepted in the UK, but I hear the US prefers the second.
Occasionally, I get emails from people who seem very upset with my spelling.
Is it best just to avoid words like this, what's your opinion?