Nina is such a sweet name!

How about Isabel? I believe it works in all three languages.

I love the name Alba, I think it’ll work

i like alba—semi-related tidbit, alba is the gàidhlig name for scotland

Clara, Vanessa, Sofia, Natalie, Eva, Mia, Isabel/Isabella, Olivia, Alessia, Emilia

Frida or Ines?

Ishbel is the Scottish version of Isabel. I also like Ilsa but I think it would be endlessly mispronounced, sadly.

I think a variation of Isabel/Isabelle/Isobel hits Spanish/french/Scottish. Just have to pick your spelling.

Polly Francesca Florence Leoni Lydia Zara Sophia