ALGOS, a research on pain team, has translated CFQ into Catalan and validated it for adolescent population (11-20 years old). A paper with a description of the psychometric properties in a sample of adolescents has been published.
Solé, E., Racine, M., Castarlenas, E., Vega, R. de la, Tomé-Pires, C., Jensen, M., & Miró, J. (2015). The psychometric properties of the Cognitive Fusion Questionnaire in adolescents. European Journal of Psychological Assessment. https://doi.org/10.1027/1015-5759/a000244
If you need further information, you can contact algos.dolor@urv.cat or Ester Solé (ester.sole@urv.cat).