Actually, English is the best language. You can express more ideas with more precision in English than any other language. There a reason it's the language of business, and continues to progress toward becoming the common tongue for everyone.
It's fun watching Japanese anime and hearing an English (or Engrish) word or phrase pop up among all of the Japanese, heavily accented of course.
"Okay" is a universal word understood by all - I've heard it in Spanish, German and Japanese language TV programs or conversations.
