Basel and Aargau
Baseldytsch, an Alemannic dialect, is the main language of this region. German is the official language, though, and nearly everyone speaks it.
Because the border to France is only a few kilometers away, most people also understand French. It is also no problem to find somebody that understands English.
Using the Public Transportation is very convenient Basel and Switzerland. You can use the train, bus, and tram to get around.
Zoo  Somewhat dated zoo undergoing renovations currently. You will see all the standard zoo fare, plus a fairly extensive terrarium and gardens. There are two eating establishments in the park offering a wide range of cafeteria style and premade foods, ice cream, and so on. From the main Basel train station, follow the footpath signs for a less than ten minute walk to the zoo.
Munster Cathedral overlooking the Rhine. Free admission, wonderful views of Basel, beautiful old church. From the Munster Platz outside, go down the stairs to the river, where you can take a ferry across the Rhine for only chf 3.20.