Brazilian football star Neymar appeared in a Spanish court on Monday at the start of a trial in connection with his transfer from Santos to Barcelona in 2013. Neymar, his mother and father, who is also his agent, face corruption charges at the Barcelona court along with former Barca presidents Josep Bartomeu and Sandro Rosell, former Santos president Odilio Rodrigues, and other representatives of the clubs. Investment firm DIS, who held a 40% stake in Neymar’s rights, brought the case to court, saying they did not get their rightful 40% share because the published transfer fee of €17 million (…