The IMC/IR(R) rating is UK-only, but there is consultation on the way to introduce something similar to the IMC in Europe. See the doc NPA 2011-16 from EASA which you can prob google.
It mentions an 'En-route IR' EIR, which seems to be similar to the UK IMC rating. I am hoping to get an IR(R) rating (i.e IMC) and am hoping at some point it could be converted into somthing like this, since at present the training for it does not go towards the EASA IR (it does go towards an FAA IR)
So I think that if you are wanting to fly in IMC in Europen on an EASA licence (as opposed to getting an FAA IR and flying an N-reg plane), you keep your fingers crossed until the new EIR appears.