Nationality and language appear on every profile because many guests book a woman who shares their mother tongue, or one from a country they are curious about.
The roster was never built around one look or one country. Fifteen women hold fourteen nationalities between them: two are Ukrainian, Angelika and Violetta, and every other passport appears once. Dutch, Belgian, French, German, Italian, Spanish, Irish and Danish make up the western side of the wall; Polish, Czech, Hungarian, Romanian and Serbian stand with the two Ukrainians on the eastern side. Each side has its own page, Eastern European and Western European, for guests who like to browse that way.
All fifteen speak English, so no guest is ever left without a common language. The additional languages are what change an evening for certain visitors. A guest from Lyon may find it easier to unwind with Danielle or Lucie in French. A guest from Milan may be pleased to learn that Laura is Italian and that Liana, Romanian, speaks Italian as well. Apart from Cindy, who is Dutch, Lucie is the one woman on the wall who also speaks Dutch. After a day of meetings conducted in a second language, being addressed in one's own can be a relief in itself.
The opposite instinct is just as common. Plenty of guests, in Amsterdam for a few nights, deliberately choose someone from a country they have never visited, and conversation in English suits that perfectly well.
A nationality on a profile is an introduction, not a grade. It carries no difference in fee, since every woman costs EUR 180 for the hour, and no difference in the terms of booking or the forty to sixty minutes she takes to arrive. The journal piece on a masseuse from your own country looks at why some guests want a reminder of home and others want the reverse.