"la mienne est rouge" confuses me, what is la doing there

@candle French rule : always add useless words like "la", "le", "de" etc.

@Hexalyse @candle UNLESS an English idiom does use precise ones, and then we scoff at this nonsense and put vaguer ones instead: "HIS hands in HIS pockets" => well, DUH, he's not gonna put his neighbour's hands in the farmer's pockets... :< => "LES mains dans LES poches" ! :p

@Louvelune @candle Best French formulation is "Qu'est-ce que c'est (que ça) ?" who literally translates to "what is this that this is (that this) ?" .... :')