Thumbs up!

Thanks to Marathon Sprachen's English language instruction, our daughter is at the top of her class.
Martin Dällenbach
Zurich, CH
Christian and AnneMarie at Marathon Sprachen are fantastic teachers and do a great job of supporting our business with ongoing language services. From language lessons to translations and interpretation, If you need a dynamic and flexible team of teachers - then I can tell you that there's no one better for the job.
Matthew Anderson — Matthew Anderson Photography
Winterthur, CH
For more than a year I have used Christian's services as a German teacher. Christian is a delightful teacher. His methods are creative and effective. My German language skills improved as did my understanding of the nuances in Swiss German.
Michelle Bird — MAP Magazine
Winterthur, CH
Christian is the only German Teacher I hired when I moved to Switzerland and he was very, dedicated and well organized. His worksheets were tailor made for me and my interests and I was always amazed at his inventiveness and professionalism. My German notebook is very comprehensive and I am lucky to have it to take back with me to the US where hopefully my children will benefit from his hard work. I would highly recommend anyone to hire Christian as their German Instructor.
Roz Birkelo
Winterthur, CH

Christian proofread my master thesis, and did not only correct wording and grammar mistakes, but provided valuable feedback from “outside” and thus encouraged me to critically revisit some paragraphs and chapters. 
Essentially, all his effort contributed to a great piece of academic work that has been awarded the highest grade from the Diplomatic Academy of Vienna.
Ulrike Czettl
Vienna, AT