Translation of Woocommerce string "Warenkorb Zwischensumme"

Good afternoon,

we are trying to locate the file where the string “Warenkorb Zwischensumme” used by Woocommerce gets translated.

All possible options in woocommerce and related extensions .po files have been adapted from “Warenkorb Zwischensumme” to “Zwischensumme”.

Nevertheless, in http://www.members.diplomatic-council.org/portal/ (password “Hang”) you still get the “Warenkorb Zwischensumme” when ordering a membership.

Is there any place in the Enfold theme where this string is translated and maybe overwrites the woocommerce string?

Thanks for any hints into the proper direction.

Thanks,
Frank