I've definitely learned that it helps to translate the translation back to English just to check... if it's completely mangled up... make simpler sentences and try again.
That "turn off your blog" instead of "check out my blog" was a pretty rude error :P
I think that google translate is good if you need traslate from one kind language to other like from one germanic language to another germanic language (English to French) or from one slavic language to another slavic language (Czech to Russian).
If you try to mix it, strange thing happens... But somethimes, if you use very simple sentences it works - like my poem: https://steemit.com/poem/@bishoppeter1/1-a-collection-of-poems-awake-nights-1-my-big-love