Hi,
That's not the goal of Falang and that's not how you should do it.
As you can see in HikaShop and HikaMarket, when you want to translate something, we display the translation interface in a popup with all fields which can be translated.
In some way, you have to do the same thing.
You do not have to create custom fields for the translations but to provide a special interface to get the translation content and store it into Falang.
But like I wrote before, it requires a development and it is not really something related to HikaMarket even if you will place your interface into HikaMarket, the code part is related to Falang.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.