As in all cities of the USA, English is the main language. You may just find yourself overhearing the last vestiges of the many ethnic groups that created the city. For instance the German burgher houses and elegant French mansions still exist on the southside, though whether you'll hear the language of the original occupants is doubtful, but you might hear Italian being spoken in the many restaurants and bars of the Hill neighborhood. It is possible to connect to the Internet through the phone sockets of most hotel rooms in the United States. If you own a mobile phone contact your phone company as it may be possible to use this to connect to the Internet.
Daylight saving is observed.