The focus of the Society: Ethnicity: European category is the cultural and national identity of the various ethnicity and nationality groups that originated in, or are associated with, Europe. Most sites found here are focused on the interests of people who emigrated, or whose ancestors emigrated, from Europe to another part of the world, or from one European country to another.
Unless your site is relevant to European ethnicity in general (this is unlikely), suggest it to the category for the specific European ethnic group or nationality it is relevant to.
Sites suggested to this category are very unlikely to be reviewed in a timely manner, unless they deal with European ethnicity in general.