When did it become a sting?

One of the unresolved questions about the Grewal affair is when Mr. Grewal decided to turn the conversations into a sting. At the outset? After he didn't get what he asked for? After seeing that Stronach got a cabinet seat, but he was refused one? After he was caught by the conservative leadership?

One point that should factor into our discussion of this is Grewal's choice of language. One thing that the transcripts do not make clear is when the words are in Punjabi and when they are in English. The discussions between Grewal and Dosanjh are in a mix. In fact, it is not unusual for Grewal to speak in Punjabi and Dosanjh to answer in English.

Here is my point. I think it is unlikely that Grewal would have been saying anything in Punjabi if he had thought that the tapes would be used to prove anything to anyone. If he had wanted to prove to Harper his loyalty, he would have stayed in English. If he had wanted to prove to the public that the Liberals were crooked, he would have used English. This leads me to believe that Grewal's original intent was to have tapes for his own record, or perhaps for future reference to remind his conversation-partners of what was agreed.