We can't say exactly what Sumerian did or didn't have because we know relatively little about it, and that only from cuneiform texcts. Its like the argument about whether 50 millon Romans spoke 'U' or 'V'. Or interchanged. If Maria orsitsch received a spoken 'Vr-Il' then she might have done just that in 1930 something. Remerber the texts we have are at least 3000 year old... Language esp if its still spken in the Aldebaran planetary system, does move on.