I am in the USA, originally from India, and my wife is American. My native language is Hindi. My wife knows only a little bit of Hindi. It hasn't been a problem because we usually talk in English anyway.
We are expecting our first baby soon and we want her to grow up knowing both Hindi and English. Most of the resources I have found about raising bilingual children are for parents when both the parents know the two languages, or when both the parents speak one language, but are immersed in another language.
The main "problem" I anticipate is that we can try "one parent, one language" system (I speak only Hindi and my speaks only English while talking to our daughter), but since my wife and I always talk to each other in English, it will not be "symmetric". Given that we are in America, it will be hard to give enough Hindi exposure to our daughter.
Are there any strategies to cope with this?