Change Text with functions.php

/* Change Text with functions.php */
function jnews_change_text( $translated_text, $text, $domain ) {
    switch ( $translated_text ) {
        case 'Submit Post' :
            $translated_text = __( 'Translated Submit Post' );
            break;
        case 'Edit Account' :
            $translated_text = __( 'Translated Edit Account' );
            break;
    }
    return $translated_text;
}

add_filter( 'gettext', 'jnews_change_text', 20, 3 );