- use RCMAIL_CHARSET const

program/steps/mail/spell_pspell.inc

@@ -37,13 +37,13 @@ $data = file_get_contents('php://input');
 $left = strpos($data, '<text>');
 $right = strrpos($data, '</text>');
 $text = substr($data, $left+6, $right-($left+6));
-$text = html_entity_decode($text, ENT_QUOTES);
+$text = html_entity_decode($text, ENT_QUOTES, RCMAIL_CHARSET);
 
 // tokenize
 $words = preg_split('/[ !"#$%&()*+\\,-.\/\n:;<=>?@\[\]^_{|}]+/', $text, NULL,  PREG_SPLIT_NO_EMPTY | PREG_SPLIT_OFFSET_CAPTURE );
 
 // init spellchecker
-$plink = pspell_new(get_input_value('lang', RCUBE_INPUT_GET), null, null, 'utf-8', PSPELL_FAST);
+$plink = pspell_new(get_input_value('lang', RCUBE_INPUT_GET), null, null, RCMAIL_CHARSET, PSPELL_FAST);
 
 // send output
 $out = '<?xml version="1.0" encoding="UTF-8"?><spellresult charschecked="'.rc_strlen($text).'">';