How do you say Kirsten in french?

Kirsten is not a common French name, so there's no direct equivalent. However, you could try these options:

* "Kirstine" would be the closest phonetic approximation.

* "Christine" is a common French name that sounds somewhat similar.

* "Kirsten" itself can be pronounced in French, but it might be perceived as a foreign name.

Ultimately, the best option depends on the context and what you want to achieve.