i have the same problem describing to guests the nature of a ride.
free ride.
UK: jumps, drops, man-made bits ridden on a “big” bike
europe: riding high alpine single trails on a medium travel bike. the UK idea of “free ride” comes under “bike park”.
XC.
UK: dashing about the hills/in the woods on walking/single trails.
europe: up and down on wide tracks, e.g. fire roads, as fast as you can.
in germany trails riding is a genre itself. the idea that you don’t think riding on tight single track to be the norm is alien to me.
i think the norwegians (assumption made on those i’ve ridden with) tend to agree more with UK terminology. probably because there aren’t that many wide open tracks everywhere, just near vertical walking trails.
i can’t be done with the whole “enduro”, “marathon” (who wants to shag themselves out riding uphill only to ride on some wide track on the way back down?)
alpine riding for me encompasses everything natural that you are likely to encounter when on a mountain. that includes slow techy, almost trialsy sections, to nice flowy, swoopy trails.
i like riding.