I could not find any evidence that people were more likely to use the drop-down menu than the old list. I suppose that the links hidden in the new menu are called "secondary", is it correct? In this case the figures show that users were less likely to use the new layout:
- 12 (or 1.1%) clicked on a link in the current list
- 3 (or 0.2%) clicked on a link in the drop-down menu
This means that the test shows that the new layout is 4-5 times worse than the older one, as people were less likely to find the language they were looking for.
Another flaw is that we do not know what language the user was looking for. It would be much more meaningful to do the following test:
- pick users whose preferred language is not in the top-10 but whose accept language includes one of top-10
- check how many of them would pick their preferred language in the old list and how many will pick the accept language in the top-10
- same for the new drop-down menu.
As an example, many users from Ukraine would be looking for Ukrainian Wikipedia, but they would not mind reading Russian Wikipedia if there is no Ukrainian Wikipedia. Are they more likely to find Ukrainian Wikipedia in the new menu than in the old list or are they more likely not to find it and choose Russian Wikipedia which is more prominent?