Translation of prospective in Spanish

I usually charge 15 dollars per hour, but I don't care very much for the hourly system. I can also help with corrections and suggestions, but only if the original text is a serious translation and not an automatic one.
A ten year old kid should not be on Facebook. I would not be too concerned about your boys, because with facebook they can see who is approaching them, that means they can see the profile and social structure of their friends.
I am glad you know, I have learned Czech and my English is also not that bad, but we could speak in German. I got your message and I want to apologize again. Next time I will do it more accurate.