What do I need to know before retiring in Barcelona?

"Before retiring in Barcelona, expats should familiarize themselves with the local language, Catalan, as it is widely spoken in the city. Additionally, they should research the cost of living in Barcelona, as it is higher than in other parts of Spain. Expats should also consider the climate in Barcelona, as it is generally mild and sunny, but can be quite hot in the summer months. Furthermore, expats should research the healthcare system in Barcelona, as it is generally of a high standard and is free for those who are registered as residents. Finally, expats should consider the cultural differences between their home country and Barcelona, as the city has its own unique culture and customs," mentioned another expat when asked about moving to Barcelona, Spain.