IT/IP/IS is no issue in german martial arts forums. At least not in forums concerned with Japanese martial arts.
I learned the vocbulary here on aikiweb. An I don't know whether there are teachers over here in Europe, teaching something, you would call IS or IP.
As far as I'm aware, the situation in Holland is much the same way. But maybe Joep will shed a different light on that. Akuzawa Sensei visited Holland a few years back but I don't know which group (or person maybe) made the arrangements for that. I do know (of) several aikidoka who went there but whether they still practice what they where exposed to or kept in touch with Aunkai, I don't know.
Maybe Rob could shed some light on this.
Far as vocabulary goes, the 'worth listening to' posters of Aikiweb and QiJin deserve the/my credit for that. I'm just trying to get a foot in the door...