Multiselect combo translation

With my PRO version I can't find out how to translate the texts in multiselect combobox component. I would like to translate "Select All" and "xx options selected" (when more than 4 items selected). Is it possible? 

The important part of my HTML follows:

<div class="form-row"><!-- Row Begin -->
<div class="col-md-4 m-b-3"><select class="mdb-select md-form colorful-select dropdown-primary dma-combo-multiple" multiple name="mcmb_roomslist[]" id="ed_roomslist">
   <option value="" disabled selected>Zaškrtněte pokoje ve skupině</option>
   <option value="001">1</option>
   <option value="011">11</option>
   <option value="012">12</option>
   <option value="013" selected="selected">13</option>
   <option value="002">2</option>
   <option value="021" selected="selected">21</option>
   <option value="022">22</option>
   <option value="023" selected="selected">23</option>
   <option value="003">3</option>
   <option value="031">31</option>
   <option value="032">32</option>
   <option value="033">33</option>
   <option value="041">41</option>
   <option value="042">42</option>
   <option value="043">43</option>
</select>
<label>Pokoje</label>
</div>

I tried the following but it does not work: 

$(document).ready(function() {
$('.dma-combo-multiple').materialSelect({
includeSelectAllOption: false,
allSelectedText: 'Vse',
});