(=way) manière f , façon f
in a ... manner, She behaves in an odd manner. Elle se comporte de façon étrange.
→ She smiled in a friendly manner.
→ They filed the report in a routine manner.
in a manner of speaking
(=in a way) pour ainsi dire
→ An attorney is your employee, in a manner of speaking.
→ "You said she was a poor widow lady!" -- "In a manner of speaking she is," Alison said.