I researched an answer for exhibiting FullCalendar on the Wordpress Multilingual WPML site, and emerged with this particular, that is working:

<?php
if (ICL_LANGUAGE_CODE == 'pt-pt') { ?>
        <script type='text/javascript'>
            jQuery(document).ready(function() {
            jQuery('#calendar').fullCalendar({
                events: themeforce.events,
                timeFormat: "H'h'(mm)",
                });
        });
        </script>  
<?php } elseif (ICL_LANGUAGE_CODE == 'en') { ?>
        <script type='text/javascript'>
            jQuery(document).ready(function() {
            jQuery('#calendar').fullCalendar({
                events: themeforce.events,
                });
            });
        </script>   
<?php } ?>

You can include other locale options, for example monthNames, monthNamesShort, dayNames, etc.

PS. I made use of this tutorial to obtain FullCalendar and Wordpress custom publish types to operate together.