I started wondering the other day if I would have to change my vocabulary to re-enact. Did Americans use contractions? I started fretting that I would mess up and be a bad representative if I spoke like modern day.
Doing some researching, I found that contractions have been around a lot longer than I thought. So they're safe. (Another reassurance is I had forgotten about the word "ain't", a slang contraction for 'am not' or 'is not' and prevalent during this time period.)
We'll never be able to completely explain how they talked in the 19th century, since none of us lived in that time. However, below is a video I just watched that address this topic.