When trying to download the GitRapidLite Basic Spanish app from the appstore website, the Storm or Storm 2 is not listed as a supported device. I tried to download it and received "This application is not available on your device or for your carrier"
I purchased MSDict (NOT Microsoft) and used it in Europe. It does not use data after it initially downloads the Dictionary or dictionaries. I think it can install the dics from the download file but I never got that to work, so I downloaded OTA.