Add CSS for better customization

Here a simple CSS

/* languageicons.css */
.block-locale {
  padding-top: 0.1em;
  text-align: right;
}

ul li.it {
  background-image: none;
  list-style-image: none;
  list-style-type: none;
}

ul li.en {
  background-image: none;
  list-style-image: none;
  list-style-type: none;
}

Note that you must add more style using the simple naming convention, for example franch: "ul li.fr".

add this function to load them, in "languageicons.module":

/**
 * Implementation of hook_init().
 */
function languageicons_init() { 
  drupal_add_css(drupal_get_path('module', 'languageicons') .'/languageicons.css', 'module'); 
}