I need help with adding an embed catalog in my site via Liquid

[StartJouwShop]

Hi Community!

I try to get a catalog in on a Shopify page via Liquid and got pretty far, only have 2 issues:

This is the code:
<div data-lang="nl" id="embeddable-catalogue"> </div>
<script type="text/javascript" src="https://api.stanleystella.com/embeddablecatalogue/build/embeddable-catalogue.min.js"></script>

This is the page I have now: 
https://www.chefscotton.com/pages/stanley-stella-promotional-apparel-catalog?_pos=1&_psq=stanley&_ss...

1.  The language ("NL" in this case) should switch when a customer is using another languages (EN/DE/ES/FR/IT/NL). 

2. For some reason I can not click to a product page, only to a collection. I know it should work, as it does on other websites: https://www.joor.it/stanley-stella/stanley-stella-catalogus/?cat=unisex&st=STTU169. Why does it work here and not on my website?

I hope someone can help me out.