Hi:
I do not use Enterprise Miner through the SAS OnDemand interface, so the extent of my knowledge is what I found when I searched. If the suggestion to change the locale did not work for you, then I think you'll need to work with the SAS OnDemand team by sending mail to SASoda@sas.com and make sure that you mention your issue is with changing the language for Enterprise Miner (so they don't assume your issue is with the language in SAS Studio).
Cynthia