I don't believe anyone would say "here every individual is happy". I'm English and I would think the person saying that was foreign! We would say "Here everyone is happy" or "here everyone is an individual personality and they are happy". I cant think of a sentence where you would say the above, its just wrong. Or I had a bad education! haha :oD
I agree, 'here every individual is happy' simply isn't a real English sentence. It's not how we would communicate the information in the Turkish sentence. In the UK we'd say either 'everyone' or 'every single person' if we wanted to really stress that it was everyone. 'Every individual' is unnecessary because it's literally what 'everyone' means. And 'every person' sounds weird too, like a non-native speaker's attempt.