I’m sorry for the shortcode, it works only as grid, it is not possible to show it as slideshow. If you know how to use jQuery and HTML, you can try to add a jQuery carousel plugin.
Contact Form: We will take a look at it, if there is a problem with the translation we will fix this as soon as possible. In the meantime (if you know how to make change in the WordPress files) you can take a look at the file “shortcodes.php” in the folder “7league/”, because for both (property page and widget) we used the contact shortcode. You’ll find this shortcode from line 914- 934, if you want you can add your translation there.