Hi,
As already explain, HikaMarket does not have translations for other languages than English.
So, you can't have German translations because the file does not exists.
You can :
1) copy the file "en-GB.com_hikamarket.ini" to "de-DE.com_hikamarket.ini" in order to have English translations.
2) Translate the new "de-DE.com_hikamarket.ini" file in order to have German translations.
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.