The tedious parts of the job, handled. The judgment stays with you.
Machine translation is only the first step. Y'AKASHA also does the checking work that specialist documents need before delivery.
Term research with sources
For industry-specific terms, the AI searches the web and gives you candidate translations with the sources it found. If it can't find a reliable source, it says so instead of guessing.
Glossary consistency checks
Save glossaries per client and language pair (bulk-import from an Excel bilingual list). After translation, the whole document is checked against them and inconsistent segments are retranslated.
Automatic QA
Flags glossary mismatches, number discrepancies, untranslated text and broken formatting, so they don't slip through.
You approve in the bilingual editor
Source and target side by side, with QA flags. Edit in place. The translated file can only be exported after you have reviewed and approved it.
Formatting preserved
DOCX, XLSX and PPTX come back in the same format with the original layout. Bold or colored text mid-sentence keeps its formatting, even between languages with very different word order.
Bilingual Excel export
Export a source/target table in Excel alongside, or instead of, the translated file. Useful for client review or your own records.
See why a term was translated the way it was, with sources.
Thorough terminology research often makes the difference between a good translation and a great one. It is also where hours disappear. Y'AKASHA searches in a fixed order of priority:
- The client's own website and official glossaries
- Websites of other companies in the same industry
- Industry media and specialist writers (not personal blogs)
When it isn't confident, it doesn't present a guess as fact. If there is no reliable source, it reports “no source found.” Choosing the final term is up to you.
Translated as the standard legal term for a non-disclosure agreement (秘密保持契約).
Translated as 営業日, based on standard usage in finance and contracts.
Rendered as ドル建て, the standard Japanese expression for currency denomination.
Strongest in English↔Japanese. We say so up front.
Y'AKASHA was built by a Japanese–English translator, and English↔Japanese is the pair we have verified most thoroughly on real jobs. The other languages work, but have been evaluated less extensively.
English ↔ Japanese
Used by professional translators on real client jobs; this is the pair where accuracy and term research have been checked most closely.
Other language pairs
Chinese (Simplified), Chinese (Traditional, Taiwan), Korean, German, French, Spanish (Latin America), Portuguese (Brazil), Thai, Vietnamese, Burmese, Arabic, Tagalog
Any combination of the 14 languages is available. For pairs other than EN↔JA, please try a short sample during your trial and review the output carefully.
What freelance translators tell us
“It researches thoroughly, which really helps.”
“On a job where I couldn't use Phrase, it saved me the time I'd have spent checking terms against a huge glossary.”
“Translation takes a while, but I can see it working carefully: researching, going back, revising. So I just have a cup of tea and wait.”
“The first draft was done while I was making dinner. That was a huge help on a rush job.”
Comments translated from Japanese.
Sign up in 2026 and try it free for 30 days.
Sign-ups through December 31, 2026 (Japan time) get a 30-day free trial. From January 1, 2027, the trial is 14 days. Once your Anthropic API key and credits are set up, you can start translating the same day.
No per-word fees and no word limits. Every feature is included: glossaries, automatic QA, term research and the bilingual editor.
- Free trial: 30 days for sign-ups through Dec 31, 2026 (JST); 14 days from Jan 1, 2027
- No credit card needed to start the trial
- Unlimited words, no extra charges from Y'AKASHA
- Cancel anytime from the Stripe customer portal
- Delete your account yourself at any time (all data erased 30 days after your request)
The $10/month fee (and the free trial) covers the Y'AKASHA software only. The AI processing runs on your own Anthropic API key, so Anthropic bills your Anthropic account separately based on usage (around $2 per 1,000 words; this varies depending on the document and how much terminology research is needed). To translate, you need an Anthropic API key and a payment method (prepaid credits) on your Anthropic account.
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Create an account
Sign up with your email address or Google account.
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Add your API key
Enter an API key from your own Anthropic account. How to get an Anthropic API key →
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Glossaries and style (optional)
Set up glossaries and style templates for each client and language pair.
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Translate, review, export
Upload a file, let the AI translate and run QA, then review in the bilingual editor and export.
Your API key, your files, and current limits
- Your own API key (BYOK). Your key is encrypted with Google Cloud KMS before it is stored. It is never stored or shown in plain text.
- Model training. Anthropic states that, by default, it does not use API inputs and outputs to train its models (Anthropic Privacy Center, as of August 2026; exceptions apply, for example when you submit feedback).
- Automatic deletion. Uploaded source files and translated outputs are deleted automatically after 60 days.
- Confidential work. Whether you can use Y'AKASHA for work under an NDA depends on your agreement with each client. Please check before uploading.
- File formats. DOCX, XLSX and PPTX, up to 30 MB per file. PDF uploads are currently not available. CAT tool formats (XLIFF, TMX, etc.) are not supported.
- Speed. Documents with many specialist terms take longer, because each term is researched and checked.
Using it as a team? We'll help you set it up.
For multiple users, consolidated billing or a shared setup, we'll suggest an arrangement that fits how your team works and help with the initial configuration. Email us at support@y-akasha.com.
Start the way that suits you
Individuals can start a free trial today. Teams and agencies, get in touch first.
News
We have revised our Terms of Service (added Article 4-2, Service Regions and Eligibility). In line with the regional availability policy of our AI provider, Anthropic, use of the service from mainland China, Hong Kong, and Macau is restricted. For details, please see the Terms of Service.
The English and Traditional Chinese versions of this site are now available.