Mazelingo — Learn English by Reading Japanese-English Mixed Texts

What is Mazelingo?

Mazelingo is a web-based reader that turns Japanese text into a Japanese-English mix. Instead of drilling flashcards or reading separate study materials, you paste ordinary Japanese content — news articles, blog posts, personal notes — and Mazelingo rewrites portions of it in English. The result reads naturally in Japanese while a controlled share of each passage is English, so vocabulary and sentence patterns are absorbed in context.

The tool is aimed at Japanese speakers learning English, and its philosophy is stated on the site as reading first, settings later. It is a browser application: there is no app install, and sample texts on themes like Halloween, cafes, news, Kyoto travel, and work can be read without an account.

How Mazelingo Works

Paste Japanese text into the Web Reader (up to 5,000 characters per conversion on the free plan), then choose two settings. The English amount — 20%, 40%, 60%, or 80% — controls how much of the passage becomes English, and it can be changed mid-read to ramp difficulty up or down. The English difficulty — easy or standard — controls the vocabulary level.

While reading, the sentence toggle lets you tap any English sentence to flip it back to the original Japanese, which is useful when a translation does not land. Display options include light, dark, and system themes plus adjustable font size. Converted text is stored on your device.

Main Features

• Adjustable English ratio — four mix levels (20/40/60/80%) that can be changed while reading.
• Two difficulty levels — easy or standard English vocabulary.
• Sentence toggle — tap an English sentence to revert it to the original Japanese instantly.
• Web Reader — paste any Japanese text up to the plan's character limit; no setup required.
• Sample text library — pre-made texts on Halloween, cafes, news, Kyoto travel, and work themes, readable without login.
• Display options — light, dark, and system themes with adjustable font size.

Pricing

Mazelingo has a real free tier and a Pro subscription, priced in yen. Free (0 yen) includes sample texts without login and, after a Google login, one conversion per day of up to 5,000 characters — no credit card required. Pro monthly costs 980 yen per month (tax included) with automatic renewal, cancellable anytime. Pro yearly costs 7,800 yen per year — about 650 yen per month, which the site says saves 3,960 yen annually.

Pro removes the daily conversion limit, raises the per-conversion cap to 20,000 characters (enough for full articles or book chapters without splitting), and allows up to 1.2 million characters per month, reset on the first of each month — roughly 600 articles of 2,000 characters each. A Google account is required for Pro.

Common Use Cases

• Daily news reading — converting morning news articles into a mixed-language read instead of a separate study block.
• Blog and note reading — learning English through topics you already follow.
• Gradual difficulty ramping — starting at 20% easy English and raising the ratio over weeks.
• Long-form practice — Pro users processing full articles or book chapters in one pass.

Limitations

The feature set is deliberately narrow: there are only two difficulty levels, no quizzes, dictionaries, spaced repetition, or progress tracking — the tool converts text, and retention is up to the reader. Free use is capped at one conversion per day, and if a long text is split, the continuation only becomes available the next day. Input is Japanese source text only; it is a reader for Japanese speakers, not a general translation tool. Text is stored on your device, and only the web platform exists — there is no mobile app. Finally, Pro requires a Google account and renews automatically.

Summary

Mazelingo applies the idea of graded bilingual reading to everyday Japanese content: it rewrites the text you were going to read anyway into a Japanese-English mix whose English share you control. The free daily conversion is enough to build a habit, and Pro's 20,000-character conversions and higher monthly volume suit serious readers. Its limits are the flip side of its focus — two difficulty levels, web-only, Japanese source text, and no learning mechanics beyond reading itself — making it best for self-motivated readers rather than learners who want structured lessons.