To be honest I find the state of the English translation of LXDE to be fairly poor, but there's no English translation available on the pootle server so I don't really know how to improve it. They are little things like capital letters in the wrong place and generally poor grammar. Here is an actual example from lxpanel: "Reserve space, and not covered by maximized windows".
What shall we do? Call for a clean-up of language? Is there anything to do at all? Why don't we get a .po file available so that we can not only correct this mess but also begin to localise for the various official variants of English around the world.