There is one phrase that almost every single Salaryman can say with perfect fluency. After much consideration, the average gent can utter, "I'm sorry, but I cannot speak any English." Another phrase I hear on an almost daily basis from students is, "How can I improve my English?"
This video should help.
While I'm on the subject, there is one phrase that we foreigners hear very frequently. After muttering a single word in Japanese (ie. at the grocery store, in a cab), we hear, "日本語は上手、ですね！" (Your Japanese is excellent.)
This has been my rant of the day!