Dyslexia is a language processing difference, so anything that has to do with words and language is a potential stumbling block. Dyslexics also tend to be big-picture, whole-to-part, intuitive learners — so reliance on rule-based learning or memorization can also be quite difficult. So if you are saying that something is “just a set of rules”… that is exactly the point. It may be very easy for you to remember the rules and apply them – exceptionally difficult for the dyslexic to do so — but the dyslexic student might excel in areas where flexibility of thought or creativity is an asset.
So part of the reason that dyslexics often struggle in academic language courses is the way they are taught — with heavy emphasis on learning rules, memorizing vocabulary lists, etc. And that has given rise to something of a myth that dyslexics can’t learn other languages – which isn’t true, as there are many dyslexic people who are multilingual. But they tend to learn much better in immersive contexts.
When my dyslexic son was age 17, he went to Thailand for a month with a foreign exchange outfit – 3 weeks was with a homestay with a family where the parents spoke no English. Son came home and spoke to me in Thai – not to express complex ideas, but to express wants and needs – like being hungry or thirsty. He had picked up a bunch of day-to-day interchange phrases.
There was a professor at San Jose State University named James Asher who developed a method of teaching languages called TPR (Total Physical Response). You can google it to get a sense of how it works. My son’s high school french teacher adopted that method for her classroom, and my son did well in French – A’s for four years. It’s built around total immersion and the sort of give & take communication that my son would have experienced in Thailand. One year my son had French the last period of the day – on alternate days because his school was on a block schedule – and on those days he would come home and speak to me in French. It wasn’t that my son was trying to show off to me — it’s that he had a hard time switching between languages. His brain would sort of get stuck on whatever language he had been practicing.
My son also took Japanese for a year in college as a sophomore. At that time his college performance was very uneven – he was getting A’s in half his classes and D’s in the other half. Japanese was one of the A’s.
But the other important thing to understand is that “dyslexia” is a broad term and each person is different. CF’s son also has Aspergers— and while on the diagnostic end of things that is a different label – for the person who carries those two separate labels, there is only one brain – and both labels are descriptive of his the overall way that CF son thinks, perceives, learns. That is, they aren’t separable inside that one person’s head. So what my dyslexic son experienced is not going to be the same as what CF’s son experiences.
I do think that my son would have found a traditional approach to foreign language learning with heavy emphasis on reading and writing to be very difficult. It was tough enough to spell a word in English … writing things out in French would have been quite difficult. His French teacher was quite determined to avoid exposing her students to written French until they had acquired a good speaking vocabulary. (Spanish probably wouldn’t have posed the same problems)
But again, each person is different. I think it helps to approach new challenges with an open mind and also to have a granular approach to solutions (breaking things down piece by piece, or simplifying).