Any reason that you want to do it outside qsys? We don't recommend user do that as the translator added by the qsys automatically. Doing it outside the qsys might hit a lot of problem, your functionality might broke down if you did not test it correctly in the simulation.
You can look into what interconnect had been added in the qsys.
If you connect it in the qsys, you will find the name for it.
In the system -> show system with platform designer interconnect, it will show all the translator or extra interconnect over there.
However, for pro edition:
Translator is meant to be used inside the interconnect with transform. Its parameterization depends on overall system configuration and can be correctly done by the transform. Hence the transform was removed from IP catalog. It still gets generated as part of interconnect.
It would be engineering decision to remove it. If you would like to look into the real design, you will have to look into the standard edition.