For ESL learners, one of the biggest barriers to reading fluently isn't vocabulary or grammar it's English spelling itself. Because English letters don't reliably map to sounds, two platforms have emerged to solve this problem in different ways: Fonetic English and Readable English. Both add visual pronunciation cues directly onto standard English spelling, but they differ in design, audience, and delivery. Here's how they compare.
The Core Idea: Markup Without Changing Spelling
Both systems are built on the same foundational principle English spelling doesn't carry enough information for a learner to reliably decode a word's sound, so both add extra visual information on top of the existing letters, without altering the spelling itself.
Fonetic English does this by adding small superscript characters above letters that don't make their usual sound, greying out silent letters, and marking syllable stress with solid or hollow dots. Once a learner knows the sound system, these cues remove ambiguity from any word.
Readable English takes a related approach using what it calls "glyphs" diacritical marks placed over letters that don't follow standard pronunciation rules. It also keeps spelling untouched, aiming to make English "100% phonetic" through markup alone.
Who Each Platform Is Built For
This is where the two diverge most. Readable English is primarily designed for classroom and school-district use. It's an edtech company built around structured literacy intervention, with teacher training, a school implementation model, and tools like a browser extension that converts webpages and classroom materials (including AI-generated lesson content) into its markup format. Its case studies and research largely center on K-12 students, often those already identified as struggling readers.
Fonetic English is built more around individual and tutor-led learning, with a stronger explicit focus on ESL learners specifically. It includes a structured sound-training system that adapts to a learner's native language identifying which English sounds are the same, similar, or entirely missing compared to the learner's first language — along with dedicated pronunciation practice tools (mouth-position guidance, recording and playback comparison) and a CEFR-aligned vocabulary system spanning A0 to B2 levels.
Pronunciation Training
For ESL learners specifically, pronunciation is often as important as decoding. Readable English's glyph system focuses primarily on decoding accuracy helping students sound out words correctly as written. Fonetic English extends further into spoken pronunciation training, with tools built around identifying "missing" sounds (sounds that don't exist in a learner's native language) versus "difficult" sound pairs (sounds a learner can produce but struggles to distinguish, such as l/r or th/t).
Vocabulary and Reading Practice
Both platforms pair their markup systems with reading practice. Readable English's structured reading practice moves students from individual words to full comprehension through scaffolded lessons and progress tracking against Lexile measures. Fonetic English pairs its markup with a vocabulary learning cycle read, listen, infer, confirm, and spaced review designed to build both word meaning and pronunciation simultaneously, alongside an eReader for extended practice.
The Bottom Line
Both platforms tackle the same underlying problem English's inconsistent spelling using a similar markup-based approach. The practical difference for ESL students comes down to context: Readable English is oriented toward school and classroom deployment, while Fonetic English is built with a stronger emphasis on individual learners, native-language-specific pronunciation training, and structured ESL vocabulary progression. Which is the better fit will depend on whether a learner is working within a school system or learning independently or with a tutor.
