Safe search for Bing queries

Safe search apparently not supported in general queries

So looking for sablier patienter yields this unexpected result:

Summary

Implement safe search parameter in queries to bing (not only images).

The problem

Steps to reproduce

Search for sablier patienter when setting the French language.

What is the current behavior?

The result above from ruenu.com appears.

What is the expected correct behavior?

Only safe results since we implemented Moderate as default value.