Sparda Bank credit card balance maintenance.

How do I transfer money from main account to a Credit Card subaccount to repay negative balance or does it happen automatically once a month?
Their online banking site doesn't have english version and I can't find the option how to do it.

I am very surprised that Sparda, which is a very big bank, has no English version. Maybe it's time to change?
Since the anser to your question varies from bank to bank, you better contact them and ask.
In many cases, your normal bank account is linked to the credit card account and they deduct the amount due once a month (fees and interest are due only if that fails, i.e. you don't have enough money on your normal account).

Thank you for explanation. You were right, they deducted it at the end of month.
I didn't have to do anything.