[lifthrasiir]

> People comfortable with English but wanting to write their website in their own language might be surprised.

A main complication here is that people don't even know about character encodings, so you can't reasonably expect them to save index.html in UTF-8 in the first place. (For example Windows notepad would use the active code page by default.) I agree that it should be featured prominently if that saving issue can be also addressed.

[voxic11]

As of Windows 10 1903 the default encoding for Notepad is UTF-8. I think its reasonable to expect relatively modern systems to default text to UTF-8.