+/**
+ * Print JavaScript in the header on the Network Settings screen.
+ *
+ * @since 4.1.0
+*/
+function network_settings_add_js() {
+?>
+<script type="text/javascript">
+jQuery(document).ready( function($) {
+ var languageSelect = $( '#WPLANG' );
+ $( 'form' ).submit( function() {
+ // Don't show a spinner for English and installed languages,
+ // as there is nothing to download.
+ if ( ! languageSelect.find( 'option:selected' ).data( 'installed' ) ) {
+ $( '#submit', this ).after( '<span class="spinner language-install-spinner" />' );
+ }
+ });
+});
+</script>
+<?php
+}
+add_action( 'admin_head', 'network_settings_add_js' );
+