Hi,
You can define specific labels for Saiku from the Survey Designer.
When you are editing an attribute, find the "Labels and Tooltip" section, then open the "Other labels" box.
![alt text][1]
You can write your label in the "Reporting (Saiku)" **"Reporting (Saiku)"** field and this will be used as caption for the dimension or measure in Saiku.
If you are using Collect Earth you will need to export the survey to CEP again, then open it in Collect Earth and finally start the Saiku analysis again in order to see the updated dimension names!
Many thanks,
Open Foris Team
[1]: http://www.openforis.org/support/upfiles/Screenshot_from_2016-10-14_09-20-19.png