If your parents are from Europe, there's a good chance that all the administrative papers (including driving licence) were available in French and a lot of the

If your parents are from Europe, there's a good chance that all the administrative papers (including driving licence) were available in French and a lot of the main buildings would have French signs at that time. Just look at the old train station of Sofia for example: https://24timezones.files.wordpress.com/2012/01/img_0033.jpg https://24timezones.files.wordpress.com/2012/01/img_0033.jpg, the new one has English instead of French now.