There are only a couple of default messages built into Tom Select. To customize these messages, and internationalize (i18n) your Tom Select instances, use the render template settings.

new TomSelect('#i18n',{
	create: true,
		option_create: function( data, escape ){
			return '<div class="create">Ajouter <strong>' + escape(data.input) + '</strong>&hellip;</div>';
		no_results: function( data, escape ){
			return '<div class="no-results">Aucun résultat trouvé</div>';
<select id="i18n" multiple>
	<option value="">How cool is this?</option>
	<option selected>amazing</option>
	<option selected>awesome</option>

Tom Select will work on RTL websites if the dir attribute is set for the context of your Tom Select instance.

new TomSelect('#input-tags',{
	persist: false,
	create: true
<div dir="rtl">
<input type="text" id="input-tags" value="awesome,neat">
new TomSelect('#select-beast');
<select id="select-beast" placeholder="Select a person..." dir="rtl">
	<option value="">Select a person...</option>
	<option value="4">Thomas Edison</option>
	<option value="1">Nikola</option>
	<option value="3">Nikola Tesla</option>
	<option value="5">Arnold Schwarzenegger</option>