English or French Version of Arcanum? Which should I buy?

So the English and French versions of Arcanum are on sale on ebay and I will buy one of them, I speak both languages so language isn`t an issue. Does anyone have any advice they can give me, does one version have defects the other doesn`t, which has more/better modules.

...modules (sorry I`m new to this) are modifications/expansion packs made by fans and computer programmers who make them for fun? If thats true thats unbelievable!

please don`t hate on the nooB, and Thanks for any advice much appreciated.

 

The answer is obvious; buy both.