AI translation: AI tools compared (5)

What aI translation tools are for

AI translation tools turn text and documents into another language. They help business teams, freelancers, researchers and anyone who needs to read or share material across languages. Depending on the service, you can upload a file, retain its layout or apply an approved terminology list. The practical change is in how you begin: you review a draft instead of translating from a blank page. Consider a technical instruction sheet. Previously, you might translate each paragraph manually and look up specialist terms separately. With a suitable tool, you can generate a draft using your preferred terminology, then check instructions and warnings against the original. DeepL supports glossaries, while X-doc AI translates technical documents and preserves their layout. You still need an informed review when a mistranslation could affect a decision or someone’s understanding of an obligation.

Example uses:

• Translate a technical instruction sheet with your glossary, then review the safety guidance before sharing.
• Prepare a French version of a sales document for review by your local business team.
• Understand an incoming message in another language before drafting a response that fits the conversation.
• Compare translated phrases to select wording that matches your subject matter and intended audience.
• Translate a scientific document while retaining its layout to make corresponding passages easier to check.

Our picks by need

These picks follow simple rules applied to the verified data, with no partnership or affiliate link:

• Best scored : DeepL. 90/100 on our access and transparency grid.
• Cheapest paid option : Reverso. First plan at €77.88 per year.

The main tools at a glance

DeepL 90/100

DeepL translates texts and documents, applies terminology glossaries and adjusts formality. It serves people who want to translate their content, use a glossary or rephrase a text. Features: Translate texts; Translate documents; Apply a terminology glossary. Entry price: €7.49 per month, with a free tier. Runs on: web browser, Windows, macOS, iPhone and iPad, Android, browser extension, and API. Data hosting: Several regions.

Smartling 65/100

Smartling lets teams translating documents and website content distribute work between AI and translators. It reuses previous translations, applies glossaries, checks quality, and synchronizes content with publishing tools. Features: Translate documents and website content; Distribute translations between AI and translators; Reuse previous translations. Entry price: $0.01 pay as you go, with a free tier. Runs on: web browser and API. Data hosting: Several regions.

Google Traduction 58/100

Google Traduction helps people translate written text, text in photographs, and spoken conversations. Users can also use downloaded languages offline and save useful phrases for later reference. Features: Translate texts; Translate photographed text; Interpret a spoken conversation. Free tier available. Runs on: web browser, iPhone and iPad, and Android. Data hosting: Several regions.

Reverso 55/100

Reverso lets people translating or reviewing text translate documents, correct grammar and spelling, and rephrase passages. It also provides examples of words in context and exercises for memorizing vocabulary. Features: Translate texts and documents; Consult examples of words in context; Correct grammar and spelling. Entry price: €77.88 per year, with a free tier. Runs on: web browser, Windows, macOS, iPhone and iPad, Android, browser extension, and API. Data hosting: European Union.

X-doc AI 53/100

X-doc AI is for people translating technical and scientific documents. It processes batches of large documents, preserves formatting during translation, and allows a human reviewer to check a translation. Features: Translate technical and scientific documents; Process batches of large documents; Preserve formatting during translation. Free tier available. Runs on: web browser and API.

The category in figures

Of the 5 tools in the category, 5 (100%) offer a free tier, 80% have a public API and 2 have a French interface. Too few tools publish a monthly price to compute a reliable median. 4 disclose where data is hosted, 1 of them in Europe or on device.

Also useful

These tools belong to another category but also cover this need:

• Whisper Whisper transcribes audio recordings, recognizes the spoken language and translates recordings into English. I
• Rask AI Rask AI lets people translating videos dub speakers with a reproduced voice. It also supports subtitle adjustm
• BlipCut AI Video Translator BlipCut AI Video Translator lets users translate video and audio files with synthetic voice dubbing. It includ
• Speech Studio Speech Studio serves people working with speech and audio files. It turns text into speech, adjusts pronunciat
• Quillbot Quillbot supports people writing or revising texts with paraphrasing and grammar correction. It also allows us
• Sonix Sonix lets people working with audio and video files transcribe them and correct text in a synchronized editor
• UPDF AI UPDF AI lets people reading PDFs ask questions, summarize documents, and get explanations of difficult passage
• Translate.video Translate.video lets people adapting videos into another language create dubbing and subtitles. It offers synt
• VMEG VMEG serves teams translating and dubbing videos. It reproduces voices in another language, synchronizes lip m
• SwifDoo PDF SwifDoo PDF lets people working with PDFs summarize, question, and edit their documents. It also supports tran
• Rythmex Rythmex transcribes audio and video files for people preparing transcripts or subtitles. Its editor allows cha
• Transgate Transgate transcribes and translates audio and video files for people working with recordings. It summarizes t

Choosing well and avoiding pitfalls

Use your own material to assess translation quality, including ambiguous phrases and specialist vocabulary. Check French support alongside the languages you actually translate into. For recurring documents, examine glossary controls and the ability to reuse approved translations. Test accepted formats, exports and the handling of tables. If colleagues review the output, check integrations and how revisions move through your workflow. Read the terms covering file retention and content use before uploading sensitive material. Compare charging models against your expected workload, including document processing and any features that require a separate subscription.

A fluent translation can still reverse a negative, soften an obligation or choose the wrong technical term. Check instructions, contractual wording and units against the source. Scanned documents may introduce recognition errors before translation even begins. Have a competent reviewer assess material where mistakes would matter. Confirm that you have permission to translate and distribute the original content. For confidential files, examine processing and retention terms before uploading, and remove personal information when it is unnecessary.

To compare with the cost of using an AI model directly, see the API price calculator.

Free or paid?

Free plans generally let you translate short passages and assess the output in your working languages. Document support, file formats and glossary access may be restricted. Paying becomes useful when you regularly process files, need to preserve formatting or require contractual terms suited to sensitive content. Check the current plan conditions against your actual workflow before committing.

Tools in the category with a free tier: DeepL, Smartling, Google Traduction, Reverso, and X-doc AI.

For which jobs?

The profiles that use these tools most, based on the use cases documented by publishers: translators, content writers, teachers, students, developers, and marketers.