Seems that way, yeah. But I might have caused confusion by myself from setting up some Google home routines on this a few weeks back.
I’ve now adjusted my routines so that the expression “set [blind] to favourite” or “…to favourite position” (i.e. British pronunciation/ spelling) triggers the action ‘set [blind] to favorite’ (i.e. the American spelling). Haven’t yet been able to do a full set of tests across both blinds with both phrases, but an initial test worked perfectly first time.
So it does seem like there is some region/ language specificity here.
Anyway, hope that’s useful for you for any future development