me; I (in informal contexts)

मैं

English Usage: Moi, I am going to the market.

Hindi Usage: मैं, मैं बाजार जा रहा हूँ।

I (used in a casual or playful manner)

मैं

English Usage: Moi, let's have some fun!

Hindi Usage: मैं, चलो थोड़ा मज़ा करते हैं!

oh me; woe is me (expressing melancholy or self-pity)

अरे मेरे; हे मेरे

English Usage: Moi, why does this always happen to me?

Hindi Usage: अरे मेरे, यह हमेशा मेरे साथ क्यों होता है?