be patient with the lady
Mine does understand me, but not always. I find I best use the exact LR recommended voice commands. I often have to repeat. I think it learns however as commands I often use, it seems to understand OK, but new commands, what a struggle.
Also exasperation, yelling, foul language and the like are not tolerated either.
It's a Land Rover first so be patient with her.
The various voices are accessed thru the NAV, at least on my 3. I like the UK female - very BBC, could be Sally.
And yes, windows all rolled up and low speed at least when starting up a new conversation. Best you do the teaching when parked and have lots of time. I find waiting for my wife at the store while she shops is a good time.