A dev had a look at your issue, the problem seems to be HTML placed where it does not belong together with copy/pasted text from microsoft Word which is interfering with the code (producing corrupted HTML).
There were also a couple of places where the languages were placed in the wrong order.
We were able to fix some of what we could find.There are lots of places that are incomplete, however – where there are only two languages listed, for example. 
One problem is that in re-pasting, we have to remove some formatting, eg bold or italic if it’s there. When we try to re-apply it, Squarespace won’t let us – it jumps the cursor up to the top of the text block, which is more than likely to be a consequence of some corruption in the HTML. This is not connected to Multilingualizer, since this is happening in the editor.
The solution to the problem would be to arrange the HTML code properly and remove the corrupted copy/paste WORD texts. Naturally, we can’t do that without your permission, as it would mean deleting a lot of the content from your website.