Seelentau wrote: It mentions the term "Rinnegan" four times, while never saying anything about the MS.
Strange, but you are translator and if you state that then I have no reason to doubt you. Anyway it is strange as everything points to Limbo being occular power and being Madara's unique jutsu and Rinnegan was never shown having unique abilties.
It can be argued that Sasuke's Rinnegan has unique jutsu, but again Sasuke's Rinnegna seems different as has tomoes and it is just one eye...not like one pair of two regular Rinnegan
Hagoromo's power+Juubi influence=Sasuke's Rinnegan