Quote Originally Posted by mikecash
The premise has a huge flaw.

Starting off encounters by asking "日本語　わかりますか?" would be discriminatory. At the very least, it is certainly not the way I prefer my encounters to get started. I prefer that people just speak to me under the assumption that I do speak Japanese.
I agree with uncle frank, only problem is that I am nowhere near fluent yet (probably not even basic conversational)