How can I change my server encoding to work with different languages?

I've got a PHP mail() function on my website; users can fill out a form to send an email. However, when a user tries to fill out the form in a non Latin-character language such as Hebrew or Chinese, the email is sent as gobbledegook. Does anyone know how to fix this?How can I change my server encoding to work with different languages?
Right click-Encoding and then choose your Windows type.How can I change my server encoding to work with different languages?
y can learn chinese

dvr

guys for the advice