The predominant spoken language is English, but in parts of Wales, Scotland and Northern Ireland their native language is still spoken.
What newcomers to the UK might find confusing are the numbers of different regional accents and dialects which can on occasions be difficult to understand, even for native English speakers!
It is possible in the early days of your stay in the UK, that you’ll need some assistance in interpreting or translating English into your preferred language. Interpretation services are often available locally and details of where and how to access them are normally available from your local authority or Citizens Advice Bureau.