Context: my mum got some keikis of this orchid from a neighbour. She managed to grow them into a full plant, it even flowered (as per pic), but she has no idea on which species of orchid it is.

I am not sure if it's a native species here (I'm in the subtropical parts of South America), but it seems to be growing just fine indoors in a Cfb climate.

Disregard the vase saying "phal azul" (blue phal), it used to belong to another orchid; it doesn't seem to be a Phalaenopsis.

If necessary I can provide further pics, but note that it has lost the flowers already.

Any idea?

EDIT: thanks to @jerry@fedia.io's comment, we could find it - it's a Miltoniopsis. Likely from Colombia or Ecuador, not from my area.