The core activity of Summa Verba Sprachdienste Henze is the implementation of language courses, sales training and consulting services for private and corporate clients. Specifically, this includes: English and German language courses for adults, sales training and communication training, consulting and support in change situations, administration of language proficiency tests (e.g. TELC, DTZ, TOEFL, GOETHE), and competency analysis and training events for adults. The company also offers one-on-one instruction and group courses, catering to professionals, students, and anyone looking to improve their language skills.