@newmumwithquestions
Schools will be in Catalan, not Spanish. Schooling in Spanish only isn't available in Catalunya. Some private schools have some subjects taught in Spanish.
International schools will teach both Spanish and Catalan.
commute the real question here is not traffic, but parking. Which will be a real nightmare . Barcelona is a very busy city. Lots of buses and tube so public transport should strongly be considered.
Pickpockets no one has mentioned this, so I am going to. Barcelona is an amazing city I miss dearly, but one thing I am glad I left behind are pickpockets and bag snatcher.s In Catalunya, stealing someone's possession up until 400 euros is not a chargeable crime, so police has no power to charge and arrest someone even if they catch them in the act. For this reason, there are thousands of successful or failed attempts to steal bags , wallets, phones from residents and tourists alike every single day. When I was living there, the average of reported thefts was 848 per day. You never put a bag on the floor next to your chair, you never put it at the back of your chair, you always carry a bag with a zip, you don't walk with your bag on your back and so on.... You leave your bag next to your towel and go for a swim, there will be no bag when you come back....
Housing when looking at flats, you need to pay attention to these two words "interior" (indoor) "exterior (outdoor) as they represent the type of windows you will get. Interior windows are often windows with not lights as close to a wall or interior court. Some rooms will have zero light. You also need to consider heating. Many houses have radiators, which is great, others have air con, which is crap, and a big chunk have nothing which is horrible . Air con in the summer is nice, but having heating in winter is better.
When visiting a house, if you notice a closed "shop" with the iron curtain down, come back at 12am because the shop might well be a busy bar or club and really noisy ( as in unable to sleep noisy) . If possible, a flat that includes a parking space would be gold.
Health care will be amazing and totally free. The kids will be seen by a paediatrician and you don't have to fight the system to get a specialist referral. Amazing parks, awesome museums , happy people, great food (in the real restaurants not the shitty tourist traps) , the beach, the mountains for skiing 3 hours away) .....
Where is your DH's work located? IF you are opting for an international school in the Barcelona Alta (Sarria Pedralbes, ...) look at any house on the train line between Sarria and Sant Cugat.