Dysspelling: why does my child make so many spelling mistakes?
This is the question that thousands of parents ask themselves every year. The child works, tries, corrects — and yet the mistakes persist, identical, tirelessly. Understanding why a dysorthographic child makes so many mistakes is the first step towards helping them effectively.
French spelling: a particularly complex system
First of all, it must be remembered that French spelling is one of the most difficult in the world. With its numerous silent letters, its complex grammatical agreements, its countless exceptions and its cascades of homophones, it represents a challenge even for learners without any disorder. For a child whose phonological processing system is already deficient, this complexity becomes a major obstacle.
Phonological deficit: the main cause
The main cause of the numerous and persistent mistakes in dysorthographia is a phonological deficit — a difficulty in processing the sounds of language in a precise and stable way. This deficit directly disrupts the ability to convert heard sounds into written letters. The dysorthographic child does not hear sounds imprecisely — but their mental representations of sounds are not stable enough to be systematically associated with the correct letters.
A faulty orthographic memory
Orthographic memory — the ability to memorise and retrieve the correct written form of words — is also deficient in dysorthographia. An ordinary reader gradually memorises the spelling of frequently used words until they recognise and reproduce them automatically, without needing to “reconstruct” them each time. In the dysorthographic child, this memorisation of spelling is slow, unstable and partial — words do not become firmly anchored in memory.
Grammatical rules: understood but not automatised
A particularly frustrating phenomenon for parents and teachers: the dysorthographic child can often explain a grammatical rule when asked — they know that “on a mangé” takes an -é — but they apply it poorly or not at all in spontaneous writing. This is because understanding a rule and automatising its application in writing are two distinct cognitive processes. Automatisation — applying the rule without thinking about it — is precisely what does not happen normally in dysorthographia.
Cognitive overload during writing
Writing simultaneously calls on many skills: thinking about content, organising ideas, forming letters, monitoring spelling, applying grammatical rules. For a child without a disorder, spelling is largely automatised — it uses only a tiny part of cognitive resources. For a dysorthographic child, spelling uses a considerable share of the available resources — at the expense of the content and coherence of the text. This is why dictations and written compositions are so exhausting for these children.
What this means for support
Understanding the mechanisms of dysorthographia radically changes the way one supports the child. Punishments, repetitive lines of copying and unfavourable comparisons are not only ineffective — they are counterproductive. Speech and language therapy rehabilitation, compensatory tools and school adjustments are the only truly effective responses. For practical resources on supporting dysorthographic children, lesdys.fr offers comprehensive guides for families and professionals.
