It is possible and there are various ways to do so!
For example, ...
- Do charades so they can understand
- use G.oo.gle Translate and type what you'd like to say!
- find another language you all might have in common
- Find someone who speaks both of the languages so they can translate/interpret
- Learn a few keywords/phrases in the other language
If one gets lost and you don't know Indonesian, for example, then try the things listed above!