Some "frenchisms" that we don't say in English:

 I'll keep updating this list. Feel free to comment some you've discovered too, or would like to know.

• "Take some news" → Catch up / Check in on someone
• "Make sport" → Exercise / work out.
• "Sorry for my late" → Sorry I'm late
• "Make a point" → talk about / touch (on) the subject .. ('make a point' existe en anglais mais l'expression parle d'autre chose)
• "I'm not sure to understand" → I'm not sure I understand
• "I want that you come with me" → I want you to come with me. 
• "I wait him" / "I wait they give me" → I'm waiting for him / I'm waiting for them to give me" (See Basic/Essential Grammar in Use, unit 52)
• "I went to/in family." → I went to see my family. 
• "Principally" → Mainly
• "In mountain(s)" → In the mountains. 

 
See also my post on "Frequent mistakes & Faux-amis"