Since herb specifically stated concentrate, which is a specific line from inawera(replaced e-aromat on the popular flavors, made even stronger and possibly tweaked slightly if needed), and since many rebottle and use the translated name(like bullcity I can see from a quick search), then it's the wanilia as MarkyD stated(concentrate, not e-aromat).
I like it myself, straight authentic vanilla without anything else, and no tobacco(i've vaped it standalone often too, a little "dry" but good - very natural imho)... I can't actually remember if I have used the concentrate or e-aromat version, but of the concentrates i've tried, then I only detected higher potency(e.g. 2% instead of 3%), and no change in flavor, so I think they only "tweaked" a few of them, if any...