Cette chanteuse a un certain talent. -- This singer has "some kind of/a certain" talent.

It is not straightforward to translate that sentence to proper English while staying true to the original French wording. The point is that certain can mean two things, depending whether it comes before or after the noun:

After the noun is easy; it simply means certain, sure.

Before the noun its effect is to make the noun a bit undefinable, uncertain. Many times the English "a kind of" works in the translation. Once you grasp what the French sentence wants to express, you then look for the best way to cast that into English.