Check the actual language assigned to the text....
The dictionary is on english UK... not French...
are there more options where i can change the language?
Language is assigned to text at the character level. Dictionary prefs affect the dictionary to be used when a particular language is assigned.
You can see the language assigned to text either in the dropdown at the bottom of the Character panel, it's analog in the Control panel when in text mode, or in the definition dialogs for the styles applied to selected text.