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No, it is used for any kind of bathing, but it sounds more formal and polite than the colloquial 'nahāvu'.

Yes, it covers both tub baths and showers. However, 'shāvar levo' is becoming common for showers specifically.

'Snan' is a Sanskrit-derived formal noun; 'Nahavu' is a Prakrit-derived common verb. They mean the same thing but differ in register.

You say 'Hu snan kari rahyo chu' (for males) or 'Hu snan kari rahi chu' (for females).

It is 'Snan karyu' because 'Snan' is a neuter noun in Gujarati.

The Ganges is in North India, but Gujaratis go there for 'Ganga Snan'. In Gujarat, the Narmada and Tapi rivers are popular for ritual bathing.

Yes, you can say 'Kutra ne snan karavyu' (I bathed the dog), but 'dhovū' (to wash) is also common for pets.

In traditional culture, bathing before the first meal of the day is considered healthy and spiritually necessary.

It means you have completed a very big, stressful task and now you are relieved.

You would usually say 'Ang luhvu' (wiping the body) or 'Bhina potu karvu'.

You can ask 'Snan-ghat kya che?' (formal) or more commonly 'Bathroom kya che?'.

Yes, Hindi, Marathi, Bengali, and many others use the same word 'Snan'.