Does one of you know a good SEO agency that can handle INTL (France, Germany, Italy, Spain)? Doesn't have to cover all countries together.
I would recommend Jumping Spider: SEO Provider | SEO Providers | Search Engine Advertising . They optimise our site and we have over 100 long tail keywords ranked #1.
Hi Cécile -- not sure if you're still looking for an SEO agency, but I'd recommend Wordbank in London; they're a hybrid marketing/localisation agency that does in-language SEO/keyword research/etc.
(Disclaimer: I used to work for them, but they really are great!)