Answer

Yes.

Explanation

In strict Digambara Jainism, devas are not silent beings. They are celestial beings with communication, so they can talk among themselves in heaven. Their mode of expression is not exactly like ordinary human speech, but the answer is still yes: devas do communicate.

Spiritual Understanding

Jain cosmology clearly distinguishes different kinds of beings, and devas are one class of living beings with higher powers and celestial existence. Their ability to communicate is part of that existence.

Takeaway

The strict Jain answer is: yes, devas talk.