Please have better 404 messages on edu-clean

edu-clean\lib\templates\wp-template\result.php has several error messages.
Example from Line 39:

<h2 id="post-header">
<?php _e("Sorry, we can\'t find the post you\'re looking for at this URL. Please try selecting a menu item from above or to the side of this message to get where you\'d like to go.", TEMPLATE_DOMAIN); ?></h2>

1) The "can\'t" and other "escaped" apostrophes actually show up as such. Screenshot: - please fix this.
2) It would be nice if there was a section in the wp-admin theme options to make custom messages for each error: category, archive, search, author, single, home, 404. - please consider this enhancement.
3) edu-clean/404.php has typos in its error message text (located at Line 5). Please fix that.

Thank you.