When I was in secondary school, I had to write an essay on the importance of English Language. When I re-read it recently, what I wrote 9 years ago was true and still is. It was written in Bahasa Malaysia, but the meaning still resounds even for the English Language.
Learning English doesn't mean that we'll forget our mother tongue. It just means that we're smart enough to find ways to gain information because there are things that still aren't translated into Malay Language. Knowing another language gives you an added advantage.
Remember : KNOWLEDGE IS POWER!