There are some laptops where that doesn't work, notable older HP elitebooks. George

It is, or was, an add-on. Don't know if it will be brought forward to work with next NVDA version, however. George

FWIW, I can bring it up on two HP computers running windows 10 professional. One is a desktop, the other is a laptop. George

You don't have to download languages to get the associated voices in windows 10 1903. Press windows key plus i to open settings. In the search box type ease of access narrator settings. Down arrow onc

In version 2019.2.1, rate boost works with 1-core voices. George

I don't find anything in preferences that turns off pronunciation of blank lines. George