Don’t let an agency treat your EU expansion like a simple translation project....

https://bizzmarkblog.com/what-questions-should-i-ask-an-agency-about-hreflang-before-i-sign/

Don’t let an agency treat your EU expansion like a simple translation project. True localization requires matching content to specific locales, not just languages. Before you sign, demand technical proof—check their hreflang validation in Search Console