5.7 If I could invest something to help all of humankind, what would I invest?

I want to invest multilingual dictionary. If you had it, you could talk to people all over the world. It will help people to translate language in just a second. The beset feature of this dictionary is the microphone. It catches every word I say clearly and translate to other language. It is easy to bring with you because of its size. It must be an important item for people who join the international meeting, too!