So I am would be used more for confirmation of something that's already been asked/said. Example: " You're an American, right?" Answer: "so I am", meaning "that's right".
On the other hand, so am I means "I am as well". Example: " You're in the military? So am I."
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April 30, 2015
1
Answered
I'm not sure if this is what you mean, but you would say something like "official English certification" to say that in English. If that's not what you meant sorry I couldn't help.
