Homeopathy is practised in all most all European countries, but regulatory status varies from country to country. You will get the full details here on how to establish a homoeopathic practice in different European countries

Possibilities for BHMS graduates
It is not so easy to practice homeopathy in Europe with BHMS.

1. Try to get permission from their local medical council by sending an application with the curriculum with the total hours of study (Theory & practical) of each subject and experience etc,.  They may give a chance to update the hours in each subject if you are fortunate. After that, you will get an equalization of your degree with that of the medical degree.

2. Possibility to practice as a complementary therapist.  Also for this, you should get permission from the local health authority.

Fluency of local language is a must in both cases.