As fatboyrafe suggests, Curious George has been translated into many languages. Here's a brief list of foreign language editions of Curious George Goes to the Hospital, according to OCLC's online WorldCat database:
Danish: Peter Pedal på hospital
French: Georges va à l'hôpital
German: Coco kommt ins Krankenhaus
Hebrew: Choni hasakran holech leveit hacholim
Japanese: Hitomane kozaru byoin e iku
Korean: Pyongwon Sodong
Norwegian: Nysgjierrige Nils på sykehus
Spanish: Jorge el Curioso en el Hospital
Swedish: Nicke Nyfiken på sjukhus