In the original there were frequent occurrences of the names of various anatomical parts or of various acts that are considered taboo now. Also there were many explicit descriptions of love scenes, even if a poetic language was used for them.

Of the old translations, only the French translation of Mardrus and the uncensored variant of Burton were somewhat close to the original text. Even the "uncensored" variant of Burton was more distant from the original text than the Mardrus translation.

There exists a much more recent French translation which is said to be more faithful to the original text than any of the previous translations (while the Mardrus translation was not censored, there were many places where it was not a word-by-word translation).

I do not remember precisely, because I have read it a long time ago, but I believe that the new good French translation is that by André Miquel et al.; various editions of that may be found at Amazon. I am not aware of any decent English translation.

When I was very young, I have read a translation into my language of the French translation of Mardrus. The first few volumes matched the French text, so they were quite explicit. Then it seems that someone noticed that and ordered the translators to remove any explicit parts, so the following volumes were obviously censored, lacking many words or entire scenes from the French Mardrus text.