First, by experience some of this medical devices are tricky on wireless.... Even they say is a 802.11g, the unit radio management info pass thru 802.11b; this mean you will need to turn on at least one off the 802.11b as supported on your WLCSigna...
Not in the WLC per say, as mention by Scott you will nedd good develover or an external server.....Another option will be using Cisco ISE (Identity Service Engine newer release 1.1 higher) that supports multilanguage change on the Web Auth/CWA splash...
No, there is an aIOS image for the 2602 here is the linkhttp://software.cisco.com/download/release.html?mdfid=284362257&flowid=34153&softwareid=284180979&release=15.2.2-JB&relind=AVAILABLE&rellifecycle=ED&reltype=latest
Even I am providing you with some links for guidance... you will need to sit down and put all your needs together to make the BEST design for your company.... but in essence you need to look at1- Centralize vs. Distribute2- Headquarters, Regional Of...