Communication
Grogu communicates through expression, babble, body language, actions, and through a little aspect called the Force. Due to the limitless opportunities of role-playing, there are various ways in which characters may be able to understand Grogu. Through the FORCE, such as Grogu's feelings, thoughts, intentions, etc. can be shared with others through the mind and/or sensory of the body/spirit/etc. However, you want your character to receive and interpret the information; it can be even as simple as a played out scene in your character's mind. Another way is through a COMMUNICATOR device, i.e. mobile, tablet, smart/galaxy-watch, etc. Once again, up to you how this will translate (if at all!) via text, audio-translation, interpretive dance through various 90s music videos... whatever.