You should determine the character code of your page among the "" tags in the source (HTML) codes of your website. The HEAD tag is at the top of the source code of your page.
For the Turkish characters to appear properly, copy the code below between the "" tags:
For PHP encodings
<?php
header ("Content-Type: text/html; charset=iso-8859-9");
?>
For HTML and ASP encodings
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-9">
March 6, 2020, 5:26 p.m.