Immersive Translate alternatives: translation vs learning

Immersive Translate earned its users honestly. Bilingual side-by-side rendering on any page, PDFs, subtitles, ebooks, and your choice of translation engine underneath. As a "make this foreign page readable" tool, it's near the top of the category.

People go looking for an alternative for predictable reasons: the free tier runs out faster than expected, the good AI engines want your own API key or the Pro plan, and there's a quiet discomfort about how much page content gets shipped to a translation service.

But before comparing tools, answer this: do you want the page translated, or do you want to not need it translated next time? Those are two different products, and mixing them up is why people bounce between five extensions.

If you just want the page readable

You're using a utility. Judge it on quality, speed, and price.

DeepL — still the quality benchmark for European languages. Browser extension plus web app, generous-ish free tier, subscription for volume. Weaker on page-layout preservation than Immersive Translate.

Browser built-ins — Chrome and Edge translate whole pages for free, instantly, with no extension and no account. The output is plainer and there's no bilingual side-by-side, but for "what does this page say" it's often enough. Underrated.

Read Frog — open source, MIT-licensed, bring-your-own API key. Same bilingual-inline idea, and you can point it at whatever model you're already paying for. Costs setup effort, and you own the key management.

Pick one of these if translation is the whole job — you're reading documentation, news, or research in a language you're not trying to learn.

If you want to stop needing it

Here's the trap with a good translation layer: it works so well that you read the translation and skip the original. Six months later your comprehension hasn't moved, because you never actually read the foreign sentence.

Learning tools invert it. The original stays in front; help is available per word, on demand; the words you looked up come back later.

Mossglen (full disclosure: ours) is a free Chrome extension built for that inversion. Any article — or a YouTube video — becomes a clean reading view in the original language. Tap a word for the meaning; it's saved with its sentence. A translation is a keystroke away when a sentence defeats you, but it's a fallback, not the default view. Reviews run on FSRS spaced repetition, and a short quiz after reading keeps the next text at your level. No account needed, 8 languages (EN, ES, FR, DE, IT, PT, JA, KO).

Readlang — the older take on the same idea: web reader, click a word for a translation, saved words become flashcards. Cheap, focused, proven.

Language Reactor / Trancy — the video-side version. Dual subtitles on YouTube and Netflix, popup dictionary, so you hear the original while reading the support line.

Pick one of these if it's a language you actually want to own.

The short version

What you want	Use
Best raw translation quality	DeepL
Free, zero setup, whole page	Chrome / Edge built-in
Open source, your own API key	Read Frog
Read the original, keep the words	Mossglen
Cheap classic web reader	Readlang
Video with dual subtitles	Language Reactor / Trancy

One thing worth doing regardless: pick a few sites you read in the target language and turn the automatic translation off for those. Keep the tool for everything else. That single split does more for your reading than any extension swap — the mechanics are in how to remember new words while reading, and the wider method in learning a language by reading.