As part of our review of the state-of-the-art, we invited all researchers into bi-/multilingualism to tell us about their experience in designing and/or using language background questionnaires. The results from this review have been submitted for publication (see preprint on the OSF).
We carried out an international, cross-sector Delphi consensus survey (in 2020) to inform the design of the new tools. The results will be published in early 2021.
Opportunities to register your interest to participate in the validation of the questionnaire will be posted here in due course.