We had to read this in second year high school Latin in "the original." Of course, the text was modernized in ways which would have perplexed the author(s). It had punctuation, distinguished between upper and lower cases in accord with established rules, included diacriticals to facilitate pronunciation and had copious notes to help us with the more difficult words and concepts. It is the only authentic Latin text I have ever read completely with understanding. Only two years of language were required and I was terrible at grammar--incapable of remembering conjugations for more than a couple of hours of cramming for an exam. Years later, in college, I tried Kepler in Latin as a bedtime read, but failed to get more than the gist of it. Now all that remains is some vocabulary.
I got through Latin classes with grades of B, C and D--my worst performance in any subject, rivalled only by A.P. Chemistry. And these were charity grades. The teachers of Latin I and II were impressed by my interest in and knowledge of Roman history. Besides, I even joined Latin Club for a year (ugh!) and probably did have the best "Derivative Notebook" in class.
The general consensus is that Caesar wrote (or dictated)'The Civil Wars' and the beginning of 'The Gallic War', but not the end of it. He probably had nothing to do with the commentaries of the Alexandrine, Spanish and African wars.