Various scales are used in studies of language learning, often in languages other than English. You can find a selection here.
Table of Contents
Questionnaires
Domain Specific Questionnaire(s)
Translations
Creator/Reference
Language Learning Orientation Scale (LLOS) Japanese
(2003) Best of Language Learning (Supplément S-1): Attitudes, Orientations, and Motivation in Language Learning
Why are you learning a second language? Motivational orientations and self-determination theory
Language Learning Orientation Scale (LLOS) Japanese & Basic Psychological Needs Satisfaction and Frustration Scale (BPNSFS) Japanese
Basic Psychological Needs Frustration in Second Language (BPNF-L2) Arabic
Basic Psychological Needs in Second Language Scale (BPN-L2) Arabic