Multiple chosen blocks on one page don't work

Problem/Motivation

When adding 2 or more language switcher downdown blocks that use the chosen library, only the first of them is actually turned into a chosen select widget. The others remain as plain html selects, which is not what I would expect from this module. The expectation is, that all dropdowns are using the chosen library.

Proposed resolution

Change the structure of the data, which is passed down to JS in order to make this work.