Think to yourself how hard you find chemistry, and whether you dislike it enough not to take it.
The reason I say this, is Chemistry and RE and two subjects which keep your options very available. For most scientific degrees, chemistry is what they look for. Even medical schools don't mind not having biology, but chemistry is essential. RE also is extremely universal, and universities like that subject. I'd say Chemistry, Maths, and RE and perhaps English Lit are 4 subjects that keep your options open.
I understand your desire to do a language, as I also had trouble deciding to do German. I also had trouble today deciding to keep it on as an A2. Do the language. Unis will like that too, and having a language will always make you a more rounded person.
I say drop the psychology. It's an interesting subject, but no universities will require a psychology A level for a degree. If your intentions are to keep your options open, and have subjects that your universities will appreciate, but you can still continue French, try:
Biology, Chemistry, RE, French.
Good luck with whatever you choose
-Edit- The person above is correct, look at what universities want on their websites. Very important to do your homework before finding out that you've dropped an essential subject for your degree.