Where did Punjabi go?

I came across the following image, which (if true) is quite an interesting way to display the data:

I am no language expert, but it surprised me that I didn’t see Punjabi, which appears in most lists as part of the Top 10, such as the current list from Wikipedia:

Interestingly, I’d never heard of Lahnda before, and when I looked it up I learned it is a dialect of Punjabi.