how change language for {GKCONTACT} ?

Where can I change translation form english to german for {GKCONTACT} ?
I have found in:
/MGFM-MEDIA/hochzeitsautomieten.de/administrator/language/de-DE
both files:
de-DE.com_contact.ini
de-DE.com_config.sys.ini

(see attachments)

BUT even i have german as default language it's still english?

So, how can I edit the the {GKCONTACT} for german?



https://www.gavick.com/forums/john-joomla3/placeholders-translation-for-gk-contact-plug-40435.html?p=200744&hilit=gkcontact#p200744

Hello,

The GK Contact plugin uses own language file - administrator/language/en-GB/en-GB.plg_system_gkcontact.ini

tks a lot;-)