– turns to ? in dropdown menu

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Hi!
I have problem with a site I am working on.
In drop down menu all – turns to ?
If I edit the text its works until I edit another part, then the problem is back again. So I can fix it partly but not full.
Its only shows in the drop down part of menu.

Any idea how I should continue troubleshooting?

The page I need help with: [log in to see the link]

 

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