The tooltip says that they can communicate telepathically with any creature that has a language, but does that mean that they must share a language? one of our players insists that he can somehow communicate with someone/thing that he shares no language with.
As "proof" that he can't, I am looking at another skill talking about communicating telepathically, Send Thoughts.
It allows the player to send a message of so many words, and then the other person can send a message of similar length back. If the message has to be so many words, how do you form words if you are not using a language?