Spain has launched proceedings against Google after accusing the search giant of five serious data breaches.
And France has given the company until September to rethink its privacy rules.
Since 2012 Google has been combining data from all of its sites in order to better target adverts - but the EU believes it needs to re-evaluate this approach.
The firm, however, insists that its privacy practices respect European laws.
A statement read: "We have engaged fully with the authorities involved through this process, and we'll continue to do so going forward."
At the end of last year the EU gave Google four months to change its data protection laws, but the deadline passed with no action, leading to the fresh actions of Spain and France.
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