Hello
"～" (fullwidth forms tilde) can not be used on the WCA mail template.
Because it is encoded by Shift_JIS.
Shift_JIS does not support fullwidth forms tilde. I understand that.
It is difficult to enter "〜" (fullwidth forms wave dash) on Windows OS.

But, in Japanese, "～" (fullwidth forms tilde) is often used.
We want to implement the function to convert "～" (fullwidth forms tilde) to "〜" (fullwidth forms wave dash) on WCA application.
Or, please give me a warning when "～" (fullwidth forms tilde) is entered. (For example, 'this template may be garbled!' Etc ...)