Is an RT license required for EASA PPL holders?
EASA itself does not require a RT license (RT is usually legislated on national level), however, it gives the state issuing your license the possibility to include RT privileges as part of your license (item XIII in the license).

This is also the most common case, ie, your PPL will most likely include RT privileges, so you will not need an RT license in addition to this.

What EASA state are you planning to have your PPL issued in?