String.toAscii

Replace all accented characters (e.g. Latin extended) and smart punctuation (e.g. smart quotes, em dashes, etc.) to their ASCII equivalent. Capitalization is preserved.

If any non-ASCII characters remain, they are removed.

$s = 'Hēllő Ťhērę…'

$s.toAscii()
//= 'Hello There...'