Hi Yves,
Ok, then this should have been posted to Languages and not Bugs..
Yes, in this particular case only the cash option is used. After I disabled all payment methods I remembered why I re-enabled the cash-option: Now the confirmation email says in Payment method in English "cash" even if I have everything else in Finnish now.. I mean the parts visible to the booking customer. The translation at Transifex is missig few lines from backend still.. I'll finish it in near future.
That "cash" did not come from the ini file you mentioned. I'll continue my search..
Thanks,
Miika