At our Moodle 3.0 plattform we would like to enable spell-check in Atto editor. According to https://moodle.org/mod/forum/discuss.php?d=371995 it seems, that spell-check should be enabled by default but at our installation it isn't working. Checked file /lib/editor/atto/yui/src/editor/js/editor.js as well as settings in browsers, spell-checking is enabled in both.
What could we do?