All the gypsy clan Lee, speak Romanian not Romani. The two languages aren't related at all. One is a romance language while the other it is believed to have its origins in Pakistan or India.
At 43:45, Tomas put a cigarette upside down on his mouth.
When visiting the Lees' camp, Tommy and Zilpha Lee speak a few lines in a foreign language. The Lees and Shelbys are gypsies, so the producers thought they should speak the language so there would be a degree of trust between the characters. The mistake here though is that the language spoken is Romanian, not Romani, a gypsy language. There is a large difference between the two. However, the producers corrected this in Series 3 by changing from Romanian to Romani.