Not sure about Goa.
The UK will need to verify they are who they claim, but generally wouldn't be too fazed about clothing.
Belgium is so laid back, it's wonder they even wake up. The friendliest people I've ever met anywhere. But only ever speak English there. Flemish people don't tend to react very well to French, (and the other way round), so English is a safer bet. Almost everyone speaks English as in the Netherlands, Denmark, Norway and Sweden.