"According to the F-K [Flesch-Kincaid] formula 74.3% of the books [in the KJV] are on or below the sixth grade level, and 94% are on or below the seventh grade level! . . . And the FRE [Flesch Reading Ease] rated 97% of the KJV books as Fairly Easy or Easy! These were all first place statistics!" (Ibid, p. 80)
If you want the original, learn Aramaic and Hebrew.
Translations are just that. One opinion of the relative meanings between two languages. As language changes over the years, various opinions on those meanings will happen.
None of the variances of any of the major translations is material, IMHO. The only controversy seems to come from those more interested in sowing discord.