I speak English and Punjabi. I use English in lessons and most of the time when I'm talking with my friends, (even if they're also Punjabi-speaking) though I might use Punjabi to talk about something like RE. When I talk to friends about football I use English, but if I'm discussing a family wedding I'll use Punjabi because my ideas and thoughts about weddings and stuff are in that language, it's like a part of me that's Punjabi.
When I go home I switch between the two with my Mum and family. Both my parents had a good education in India and my Mum's a teacher, so she speaks and writes English really well. But they also always use Punjabi for family matters like telling me and my brothers off, discussing relatives and visits, food and clothing. I also use Punjabi when I talk with one of my uncles, who is less good at English than my Mum, and whenever I go to the gurudwara.
The Punjabi of the Sikh holy book is really old fashioned, so I don't really understand it, but I can understand the prayers - just as well really since I can't see how I could be a Sikh if I lost that. For me, my other language is how I keep in touch with my roots. This is what Punjabi looks like when you write it
