The overlap between SpLDs (and other disabilities) and language learning is a field that is becoming more widely researched and described. Here are some useful resources:
Kormos, J. & Smith, A.M. (2012) Teaching Languages to Students with Specific Learning Differences (MM Textbooks) . Clevedon Bristol; Multilingual Matters.
Smith, A.M (Ed.) (2020) Activities for Inclusive Language Teaching: Valuing diversity in the ELT classroom. Stuttgart: Delta Publishing/Ernst Klett Sprachen GmbH.
‘specific learning difficulties and the learning of additional languages’
Professor Judit Kormos has created a website, which collects together many useful resources and links.
Bogdashina, O. (2004) Communication Issues in Autism and Asperger Syndrome . London: Jessica Kingsley Publishers.
Goulandris, N. (Ed.) (2003) Dyslexia in different languages: cross-linguistic comparisons . London; Whurr publishers.
Grant, D. (2010) That’s the Way I Think: Dyslexia, dyspraxia and ADHD explained (2nd Edition) . Abingdon: Routledge.
Kormos, J. (2017) The second language learning processes of students with specific learning difficulties. London: Routledge.
Kormos, J. and Kontra, E. H. (2008) Language learners with special needs : an international perspective . Bristol; Multilingual Matters.
Martin, D. (2013) Researching Dyslexia in Multilingual Settings. Bristol; Multilingual Matters.
Nijakowska, J. (2010). Dyslexia in the Foreign Language Classroom (Second Language Acquisition) Clevedon: Multilingual Matters.
Schneider, E. & Crombie, M. (2003) Dyslexia and Foreign Language Learning London; David Fulton Publishers.
Swan, M. and Smith, B. (Eds) (2001) Learner English: a teacher’s guide to interference and other problems . Cambridge: CUP.
Tsagari, D. and Spanoudis, G. (Eds.) (2013) Assessing L2 Students with Learning and Other Disabilities (Linguistics) . Newcastle; Cambridge Scholars Publishing.