How would any of us know? We were not around to hear every word Lincoln uttered. I doubt each word was documented for posterity.
What we don't have, but which all his contemporaries commented on, are the stories and jokes he told. Maybe because, for the time, a lot of them were country style bawdy. They allude to it in all of the movies ... Henry Fonda 1939: "Well then if it's all the same to you, I'll call you Jack Cass". Today with Trump it's almost the reverse. Throughout his career before becoming a candidate Trump can probably count fewer than ten occasions when he had to deliver a carefully prepared lawyeresque speech. So trying to compare his and Lincoln's styles is pointless.
And besides, I never heard of Lincoln saying anything like "And ah tain't no ways tard" either.