Language in Lysistrata?

I noticed in the play that the Spartans have a different dialect than the Athenians. The Athenians have a more proper way of speaking while the Spartans talk as if they are country. I think they are potrayed to speak like this because it might symbolize that they are not intelligent. It could also symbolize the differences in culture between the Athenians and the Spartans through the language.