Blog · Accessibility & Apps

Language learning apps and dyslexia

10 min read · September 13, 2026

Wanting to learn a language is not the same as being able to push through the way most apps are designed. Duolingo, Babbel, Memrise, and similar platforms are built around short text prompts, rapid feedback loops, and dense vocabulary lists displayed in whatever font their designers chose. For readers who have dyslexia, that combination creates friction that has nothing to do with how good their ear is or how motivated they are.

This article looks at the specific ways dyslexia complicates language learning apps, what browser-level changes actually help, and what each major platform lets you adjust — and what it does not.

Why language learning is especially hard with dyslexia

Learning a language requires holding new words in working memory while also mapping them to sounds, meanings, and grammatical rules. Dyslexia affects the phonological processing and orthographic mapping that underpin all of that — not just the reading of words you already know, but the acquisition of entirely new ones. This is a compounding burden: where a typical reader can offload some of the cognitive work onto pattern-recognition built up over years of reading in their native language, a dyslexic learner doing a Duolingo exercise is wrestling with the rendering of the text and the encoding of the new word at the same time.

The result is faster fatigue, more errors that are actually visual rather than linguistic, and a tendency to underestimate how much you know because the lesson felt hard in ways unrelated to the target language. Understanding this distinction — is this hard because French is hard, or because my brain is spending extra cycles on the letterforms? — is the first practical step.

For more on how working memory intersects with reading difficulty, see our article on dyslexia and working memory.

The typography problems specific to language apps

Most language learning platforms share a set of typographic choices that are reasonable defaults for typical readers but create unnecessary obstacles for dyslexic ones:

Small, dense body text. Duolingo's web interface renders vocabulary and sentence prompts at around 16–18 px in a fairly compressed system font. This is not small by web standards, but it offers no line-spacing or tracking adjustment. For readers who need slightly more breathing room between words, there is nothing to change within the app itself.

Arbitrary font choices. Babbel uses a custom sans-serif that is clean but not particularly legible for readers who confuse similar letterforms. Duolingo uses a rounded sans which is friendlier, but again offers no override. Memrise has some of the most cramped default text of the three. None of these are dyslexia-hostile by design — they are just not designed with dyslexia in mind.

Timed exercises. Duolingo's listening and typing challenges are timed. Time pressure amplifies the effect of visual processing difficulties: when you need to re-read a sentence before you can answer, those extra seconds come straight off the clock. This is particularly punishing for phonological dyslexia, where decoding even familiar words takes measurably longer.

Mixed scripts. If you are learning a language that uses a different alphabet — Russian, Greek, Japanese, Korean, Arabic — the letter-confusion issue is multiplied. Every glyph is unfamiliar. The visual similarity between Cyrillic и and and п, or between Arabic ب and ت and ث, can be harder to parse than the b/d/p/q reversals in Latin text. This is not dyslexia-specific, but it disproportionately affects dyslexic readers whose visual decoding is slower.

The spacing difference in that demo is not dramatic, but across forty exercises it adds up. Dyslexic readers consistently report fewer re-reads and lower end-of-session fatigue when line height is at least 1.6 and letter spacing is slightly loosened — see our article on line spacing and letter spacing for dyslexia for the evidence behind this.

Browser-level fixes that work across all platforms

Because Duolingo, Babbel, and Memrise all run in the browser when accessed on a desktop or laptop, you have tools available that the apps themselves do not provide. These work regardless of what the platform allows or does not allow in its settings.

Font override

The most impactful change is replacing the platform's default font with one designed for legibility or dyslexia-friendliness. LexiFont does this in one click: install it from the Chrome Web Store, choose a font — Lexend, Atkinson Hyperlegible, or OpenDyslexic are the most common choices for dyslexic readers — and it applies globally to every site, including language learning apps.

For language learning specifically, Lexend performs well. It was designed to reduce visual crowding between letterforms, which is the exact problem that makes dense vocabulary lists hard to scan quickly. Lexend in Chrome covers the setup in detail. Atkinson Hyperlegible is a better choice if you struggle specifically with ambiguous letterforms (i vs l vs 1, for example) — it is more systematically differentiated at the character level.

OpenDyslexic is worth trying if letter rotation is your primary difficulty. It is more visually assertive than the other two, which some readers find distracting in an interface that already has a lot going on visually. See OpenDyslexic in Chrome for a guide to applying it with LexiFont.

For a comparison of your options, the best fonts for dyslexia in 2026 covers the current field.

Browser zoom

Ctrl/Cmd + Plus increases font size on any website and automatically adds spacing as a side effect of the scaling. Setting zoom to 125% or 133% in Duolingo is a low-effort change that takes about two seconds and often makes a meaningful difference. The downside is that it can break some layouts — particularly Duolingo's exercise cards, which clip rather than reflow on some screen sizes. Test at 110% first. Our article on browser zoom and text scaling for dyslexia explains how different sites handle this.

Word spacing

If you use a browser extension that injects CSS — or are comfortable opening DevTools — increasing word spacing to 0.25em–0.35em makes a noticeable difference on vocabulary lists and sentence prompts, where words are presented close together by default. This cannot be done through LexiFont's current interface but is achievable with a user-script extension like Stylus. See word spacing and dyslexia for the rationale.

Dark mode

Duolingo has a native dark mode. For some dyslexic readers, reduced contrast in dark mode lowers the visual intensity of the page and reduces glare-related fatigue. For others, white text on dark backgrounds increases halation around letterforms, making them harder to distinguish. Test both: dark mode is not a universal benefit, and the research on dark backgrounds and dyslexia shows mixed individual responses. See our article on dyslexia-friendly dark mode.

Platform by platform: what each app gives you

Strategies that go beyond the screen

Even with better typography, language learning with dyslexia benefits from working with the medium rather than against it.

Lean on audio heavily. All major platforms give you audio pronunciation. Play it before you try to read the target word, not after. This means your visual processing is trying to match a sound you already know to a letterform, rather than the other way around. That order matters: phonological grounding first, orthographic mapping second.

Use the web version on a large screen where possible. Mobile apps offer even less control than the web versions. On a desktop or laptop, browser zoom, font overrides, and CSS tweaks are all available. On a phone, none of them are. If your primary difficulty is with text rather than audio, do text-heavy exercises at a desk.

Take shorter sessions. The reading fatigue research suggests that dyslexic readers often hit diminishing returns faster than typical readers when processing unfamiliar text. A twenty-minute session with a break outperforms a forty-minute unbroken session for retention and accuracy. Duolingo's streak mechanic pushes toward daily consistency, which is genuinely useful — but "consistency" does not require each session to be long.

Use Anki for vocabulary review. Anki's spaced repetition system is the same engine powering Duolingo and Memrise's review modes, but Anki is entirely user-customisable. You can design cards with the font, size, background colour, and spacing that work for your reading. Pre-built shared decks exist for almost every language pair. The learning curve is higher than Duolingo's, but the typographic flexibility is unmatched.

Separate reading from listening practice. Most platforms let you toggle listening and speaking exercises independently of reading ones. If a session is visually taxing, shift toward audio-only exercises for the second half. Pimsleur — which is almost entirely audio — is worth using alongside a text-heavy platform rather than instead of it: the two modalities reinforce each other, and switching between them prevents the specific fatigue that text-heavy practice creates.

A note on learning languages with a different script

If your target language uses Arabic, Hebrew, Cyrillic, Hangul, or any script you do not already read, budget extra time and be patient with yourself. The visual decoding demands are genuinely higher when every glyph is new. A few practical notes:

For Arabic and Hebrew, right-to-left text is handled correctly by browsers and most apps, but font rendering quality varies significantly. Arabic in particular benefits from a high-quality font: the default system fonts on Windows and macOS handle Arabic adequately, but some app-specific fonts render it with very thin strokes that are hard to distinguish at small sizes. Browser zoom helps here more than anywhere else.

For Cyrillic and Greek, the specific letter-confusion pairs differ from Latin text (Cyrillic р looks like Latin p; Cyrillic н looks like Latin H), but the same principle applies: weighted, well-spaced glyphs with consistent stroke widths are easier to learn than cramped ones. For Cyrillic specifically, Lexend has excellent coverage. For scripts that LexiFont's current font options do not cover fully, browser zoom combined with your operating system's default fonts is the most reliable approach until better coverage becomes available.

See our piece on font choice for bilingual readers with dyslexia for a fuller treatment of this.

If you also have ADHD

A significant proportion of people with dyslexia also have ADHD — the co-occurrence rate is estimated at around 30–40%. Language apps are not designed for either profile, and the combination makes timed, high-distraction interfaces particularly punishing. A few adjustments that help specifically when ADHD is also in the picture:

Duolingo's animated characters and motivational pop-ups — the confetti, the streak notifications, the "You're on fire!" banners — are deliberately attention-grabbing by design. Browser extensions that block specific page elements (uBlock Origin can target these) can quiet the visual noise without breaking the exercises. Disable sound effects in settings if audio distraction is also an issue. For more, our article on reading tools for ADHD covers the overlap.

The honest picture

No browser tweak makes Duolingo as flexible as a human tutor or a well-typeset textbook. What these adjustments do is remove friction that has nothing to do with whether you can learn the language — friction that would otherwise cause you to abandon a session early, retain less from the session you do complete, or conclude incorrectly that you are not good at languages.

The font override is the highest-value change, and it takes about thirty seconds to set up. If you have not done it, installing LexiFont and switching to Lexend or Atkinson Hyperlegible is the place to start. Everything else in this article builds on top of that baseline.

If you are learning a language intensively — for work, for a move abroad, for an exam — it is also worth knowing that LexiFont Pro lets you set font preferences per-site, so you can have different fonts for your language learning app and your email client, each optimised for what you are doing there. That per-site control means you are not making a trade-off between what works for Duolingo and what works for everything else.

Further reading

• Best fonts for dyslexia in 2026 — a research-first guide
• Line spacing and letter spacing for dyslexia — what the research says
• Dyslexia and working memory — how they interact and what helps
• Font choice for bilingual readers with dyslexia
• Reading tools for ADHD — what actually helps
• How to change the font on any website in Chrome