Hmm I can only talk about my experience.
For me it's much easier to grasp different concepts I've seen in another language for example channels in go I walked to a java guy asking him how he does it in his language so I could specifically ask for something I did not know the term in the other language.
or how generators are kinda state-monads based on functional languages ... :)
So for me the advantages are concepts which can transcend other languages ! :)