@High Seas,
how about grammar?
I haven't seen Perseus yet (will check) but some sites, Babel Fish, for example, are a complete joke at translation, at least re another language I fractionally know, Italian, and another one I know even less, Spanish. I still have about twenty ital language books and thick notebooks of my own compilations of grammar/verb conjugations, which I did as a way to ram all that through my thick skull by incremental accrual. Living there would have been smarter, but impossible at the time, and I still would have been searching out grammar books.
That's one thing about a background with latin - it left me quite grammar oriented, even if that is not discernible in my online chat - but left me not very agile in learning to talk in another language.
Ah, I just saw your second link.. thanks.