Some of my family are deaf and use British Sign Language and spoken English to communicate. They are very keen on the idea of me teaching DC (due in 8 days!) BSL or baby sign. I'm a native English speaker and learned BSL too, but DP is German and his family only speak German. We are planning to use OPOL for English and German as we speak a mixture to each other. We aren't planning on moving to Germany but there is the possibility of attending the German school in England, although clearly this is still a long way off. Spoken English and German are our priority as my family can speak and understand English perfectly well.
I'm worried 2 spoken languages and 1 sign language be too much. If we do try to bring in the sign language, when should it come? Obviously it's easier to learn any language from birth but DP can't sign, although baby sign looks relativly easy to master. Does anyone have any experience of 2 parents using different spoken languages but both using baby sign (possibly later to develop into BSL)? How successfully? Or does this sound like a plan doomed to fail? I'm worried it might delay speaking or delay German speaking (if only I used it). Could it help baby to physically see that one thing has two words, one in each language?
Please help!