Phantasy star online on the dreamcast... especially the early years before all the hackers came and destroyed it..
the "word" translate option was just fantastic and you could string together fixed words into sentences and be translated into 5 different languages.
playing with some real hardcore japanese, american and european gamers, and it ran fantastic on 56k dial up modem in those days.
ate up way too much of my life tho and I was up till daylight playing this game..