Quietone
Thank you for all your comments. They are very helpful indeed. The situation is made a bit harder as my DILspeaks her first language to the baby and her family when I am around much of the time that in itself leaves me feeling more of an outsider. I am working on getting to know my DIL and as Grams2five said, respecting her as a wife and mother first and following
their lead.
But do your dil's family all speak /understand English well enough to follow and join in themselves Quietone? If so, then yes, it is inconsiderate of them to not speak it when you are there, but it might be a bigger problem for them than you realize.
My own dil has always spoken her first language to her daughter, our dgd, as that is the only way dgd is likely to grow up bilingual, and we wouldn't have it any other way.
That said, she (dil) will always repeat anything said in English if necessary.
However, when her parents and grandparents visit, things are different, as their grasp of our language is no better than our grasp of theirs, so it is unreasonable to expect all the conversation to be in English, especially if there are more of them present. In that situation, dil tries to translate but it is mentally exhausting for her to do that for long.
(I have tried to learn my dil's native language, and her mum gas tried to learn English, but neither of us can follow conversations in the other's language, though when left alone we often manage to communicate simple things through terrible attempts at each others language plus a lot of miming. Good fun, especially after a few drinks, anyway 😂)
I only have sons, so can't compare the bond I have with them with how it might be with a daughter. But - a big but - I do think that a new mum tends to dictate the course of the grandparental relationship with their child to a much greater extent than the dad, and that is what you are experiencing.
I am lucky, as I like my dils and get on OK with them, but from the very start I realized that my relationship with them would never be a mother-daughter one. I advise any new grandparent , but particularly those on the paternal side of the new family, to have no specific expectations and to just go with the flow.