you can try this
$AC00~D7A3
$0021~002F
$003A~0040
$005B~0060
$007B~10FB
$1E00~312C
$3190~9FA5
$E801~FF0F
$FF1A~FF20
$FF3B~FF40
$FF5B~FF9F
$FFE0~FFFD
this can allow English name
and one more thing, you can check guild nickname by gmtool then add bad words below [CHAR]