@article{asharedgeometryofdifficultyinmultilingua,
  title = {A Shared Geometry of Difficulty in Multilingual Language Models},
  author = {Stefano Civelli and Pietro Bernardelle and Nicolò Brunello and Gianluca Demartini},
  year = {2026},
  eprint = {2601.12731},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2601.12731},
}