If either of you read the article, you would have read that she has aphasia. Her condition means while she knows what she wants to say, she no longer possesses the cognitive ability to express it by typing it or writing it.
Which is why the display currently is simple. The intention is to expand what she can say later, but this is a first step.
There was, somewhere, possibly on Reddit, the full article on this that went into greater detail. The Make article that's sourced above isn't the full article.







