Where is the story set? (You can get clues from the names of the persons and places mentioned in it.) Which language or languages are spoken in these places? Do you think the characters in the story spoke to each other in English?

This story seems to have been set in the rural background of Uttar Pradesh. The name of the sweet shop as JAMUNA SWEET SHOP sounds an impression of the setting in rural background. Mention of Lucknow Express gives an indication of being somewhere in U.P. As boarding of Lucknow Express must be nearest be nearest destination.
In these places Hindi is the spoken language. If Hari Singh knew how to speak English then he could have easily got a job. We also come to know that Anil starts teaching him small sentences. So, we cannot imagine the characters speaking in English to each other.

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