Sharing our own culture, history and language don't make him Human as well?

What is your true question here? What are your trying to achieve by getting a correct answer to this question? The answer depends on that, because the "question you should have asked" itself depends on that.

If by "Human" you mean "member of the homo sapiens species", of course sharing culture and history and language doesn't achieve any of that. This question and answer could be useful for example in context of medicine -- just because the robot with the liquid metal in his veins speaks our language, it wouldn't be a good idea to try transplating his organs to humans or vice versa.

If by "Human" you mean "someone we could interact with just like we do with ordinary humans", seems like you have already answered positively. (Except for the fact that the robot is programmed to obey Europa. That would perhaps make him more analogical to a slave, who is always in a risk of having his wishes trumped by his master's wishes. Or perhaps analogical to a drug addict, whose promises are quite unreliable because using the drug always takes priority. Depends on how often and in which manner does Europa influence the robot's behavior in everyday life.)

Downloading and reading this free book could help you answer many similar questions.