It was answered on email. Posting reply here:
Here are your answers:
1) No, not yet available in French but we will launch 5 language packs french is one of them. 8 week is the timeline.
2) Currently, all payment comes to shop admin, sellacious software calculates how much you own to seller, seller also see his unpaid balance in his inbuilt ewallet, he can use it to pay the listing fee, or buy any stuff on your website, or else he can ask for withdrawal, if he ask for withdrawal you will receive request, which you as admin will pay offline. after admin make the Payment, he can approve withdrawal request and sellacious will permanently deduct locked funds from his ewallet.
We are also coming up with paypal adaptive and stripe connect plugins which can be used for automatic withdrawal.
Some important notes:
Seller will see locked funds until the time refund or exchange period does not expire of the sale made by him in his ewallet.
Seller funds will also stay in locked status when he raise withdrawal request, and deducted when withdraw period is over.