I have never spent a Christmas with MIL. According to DP they are usually miserable (she is not a very happy person) and so he has spent the last three Christmases with me - we tried to invite her last year but she booked herself on a cruise in February before we asked. This year we asked in January and got in first! 
She loves playing board games (and winning, who doesn't! Although she sulks a bit if she loses) and we have her favourite, which fortunately my parents can play, at home.
We have the 23rd to 26th to fill... On the 23rd my parents and DSis are arriving so I think it will be filled with introductions (they have never met). MIL speaks limited English, not enough for a conversation, and DParents and DSis don't speak any of her language.
We can go for walks etc. but normally Christmas in my family is games, puzzles, food drinking etc. in front of the TV but MIL won't be able to understand the TV and I am worried she will feel left out.
I really want her to have a good Christmas and feel included. Does anyone have ideas for games that don't require a lot of English/linguistic communication? I have UNO, Rummikub, dominos, pick up sticks and a few packs of cards. Normally we play Monopoly, Scrabble and Cluedo. I was thinking about buying a huge puzzle but that feels a bit enforced.