Thank you
We have edited your templates styles.php (../templates/j51_central/php/styles.php) to support Turkish characters by replacing the following...
echo '<link rel="stylesheet" type="text/css" href="http://fonts.googleapis.com/css?family='.$v.':100,200,300,400" /> ';
With...
echo '<link rel="stylesheet" type="text/css" href="http://fonts.googleapis.com/css?family='.$v.':100,200,300,400&subset=latin,latin-ext" /> ';
Ensure the Google fonts you selected have the Turkish characters available.
Ciarán