Ability to switch to UK English - spelling

What is the challenge?

Aha! is very American, but I'm not, and in a global role. Our company policy is to use UK English.

What is the impact?

All my content, looks like it is riddled with errors, as so much is underlined (as system is highlighting UK/US spelling differences). It risks me missing actual errors

Describe your idea

Ability to change your default dictionary/spell checker