Yes, localization. By putting the labels in the dataset, Epicor has the opportunity to translate them before it gets to SSRS. For example, order acknowledgements and invoices will be generated in the language of the customer set in Customer Entry. We’re in the process of making the translations we need for our European branch and it would be a nightmare without this functionality. Even without the different language packs purchased, you can (or I can on my on-prem/Azure E10 install) manually put in the translations your business needs. I’ve even got a nifty little trick using Excel to create an XML file that Language Maintenance can import.