Publicizing on Facebook uses the wrong language

Hey everybody!
I have a multilingual blog, with the main language set to English. However the publicizing tool from Jetpack keeps posting on Facebook in German, even though I want my posts to be publicist on English there. On Twitter in publicizes the post title in english as well as in German and I would like to only have the English title there.
My blog is: https://www.sparklingcrane.com
Does anybody have a suggestion for me how to fix this problem?
Thanks a lot!
Sarah