I once posted about Jean-Philipe Baratier, a Christian child prodigy. The 12-year old's fully annotated translation of
מסעות של רבי בנימין (
The Travels of Benjamin of Tudela)
1 can now be read
here. If you're French is good you can see an impressive feat for itself.
1 Various editions:
here,
here,
here,
here and
here.