What languages are available which you can put in hospital.cfg?

German, French, Italian, Swedish, Spanish.

GER, FR, ITA, SWE, SPA.

You can use your copy of theme hospital with CorsixTH which supports:

"Norwegian",
"Swedish",
"Danish",
"French" ,
"German",
Chinese (traditional)",
Polish",
"Finnish",
"Dutch",
"Portuguese",
"Czech",
"English",
"Italian",
"Brazilian Portuguese",
"Russian",
"Chinese (simplified)",
"Spanish",
"Hungarian"