For the second edition, typeset 11/2013
p43, def. 2.10, p45, def. 2.13, p47, def. 2.6: each occurence of QL' should be replaced by Q'L' (there is no obligation that the entity languages be the same on both sides).
p116, ex. 5.38: can you guess what problem would cause to replace Thomas de Aquinus by Augustine of Hypo?
p310, 9.3.3: QL' should be replaced by Q'L'