Like Millomite I don't think the actual command matters, so long as you use the same ones all the time.
With Tilly I don't know what she was taught before but I am using the same for her as I do for Alfie and so far we haven't had any problems, she's adapted perfectly. She also understands pointing and will look in the direction I'm indicating. Alfie just looks at the end of my finger
I use:
2 pips - turn
3 or more pips - recall
long blast - stop and wait
Hup - sit
Hi! - look at me
Go on - when first sending them out to hunt AND to encourage them into water or cover (I also point)
Whoa - to steady them whilst in action
Over - to jump a fence/ditch
Seek - to encourage them whilst hunting (said 'seekseekseek' in a high pitched excited voice)
Hi Lost - to find a dummy/bird and hopefully retrieve it