You can ask so-called 1st-grade contacts for a recommendation. Go to the profile of the other person and beneath their profile pic you can click on more. Hereby you can ask, combined with a nice note, for a written recommendation. In the best case, the other person will write it in English.
Important: The recommendation has to be written through the LinkedIn tool. You can’t include written recommendations which you received for example through a mail in your profile. Only through the recommendation tool, LinkedIn is able to verify the reference.
Keep in mind that it is a two-way road: If you ask another person for a recommendation you should be ready to return the favor. You can also go ahead and write a recommendation first. This could be a nice opening to this whole topic.