Machine translation programs don't all use the same translation protocol. Some cover more languages than others. Some programs have bigger dictionaries than others. Some seem to translate better in one direction than in the reverse. Simple sentence structures translate the best.
Some programs are faster than others.
Interpretation of the result is almost always required. Machine translations should not be relied upon when accuracy is critical. Here are a few suggestions. Use these translation programs in conjunction with Field Guide to keep up with the news in countries where you do business. Use them to browse foreign language pages found in Field Guide .