A very handy way for me to read and understand unfamiliar words in english text is the translation software Babylon(.com). Point mouse on a word and click Ctrl+Right click and You get a translation in desired language. It's working fine with L3 but not at all with L4. I thought it may depend on my old version (7.0).
Today I upgrade Babylon to 8.0 but there is no difference. Logos 4 isn't compatible with Babylon. Babylon didn't "recognize" any text inside L4. "Foreign" customer, like me, may be depending in this kind of software to fasten up their reading and understanding.
I think it would be great if Babylon will work with Logos software in the future.