Should languages be taught in primary school?

I was never taught languages at primary and I have bad memories of learning French and German in my time at secondary. I've had two language seminars now and found myself wondering if having languages in the curriculum is worth while. Don't get me wrong these seminars have been fun and they have given me some good teaching ideas but should it be in the curriculum?

My opinion is that to learn a language you need to be motivated and willing to put in a lot of time. If not enough time is being put in then you will fail in learning and there is not enough time in the primary school day to do languages daily (which I think is needed to properly learn a language). If it is not being taught enough then it will be forgotten. I can't remember any French and German and I now feel it was it was a waste of my time in learning. If the language you're learning is not going to be used then is it worth learning anyway?

For this reason I feel it should be optional like an after school club so the children that want to learn a language and are willing to put in the time then they can. I understand that to learn a language it is going to be much easier to start at a young age but if it is not being taught enough and the children don't see the benefit of learning then surely it's a waste of time?