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Rosetta Expands T-400 to 38 Languages

On June 25, 2026, Rosetta, a subsidiary of Metarial Group, announced a major enhancement to their leading AI translation service, T-400 (T-Four-O-O), by expanding its high-accuracy mode to support a total of 38 languages, increasing from the previous 15 language options. This change is a response to user requests and aims to facilitate greater access for those who previously relied on traditional translation methods due to language limitations.

Expansion Details

T-400’s high-accuracy mode benefits significantly from this expansion. Initially launched with just 4 languages on March 5, 2026, it quickly grew to 15 before this latest update added an additional 23. The high-accuracy mode utilizes internal translation assets to ensure that the tone and expression of the translations are spot on, allowing users to experience higher quality translations across a broader range of languages.

Newly Added Languages

The newly supported languages include:

• - Korean
• - Hungarian
• - Norwegian
• - Russian
• - Czech
• - Hindi
• - Dutch
• - Danish
• - Hebrew
• - Khmer
• - Filipino
• - Finnish
• - Malay
• - Swedish
• - Sinhala
• - Turkish
• - Mongolian
• - Bengali
• - Polish
• - Ukrainian
• - Romanian
• - Arabic
• - Nepali

These additions are particularly valuable for businesses engaging in multilingual communication, providing smooth translation for technical documents, contracts, and manuals shared with international branches.

Use Cases for Multilingual Document Translation

The expansion of languages in T-400 is set to enhance translation accuracy significantly within various professional documents. As global businesses continue to grow, the efficiency of translating multi-language manuals, contracts, and technical documents is crucial. Industries, such as manufacturing and legal sectors, will benefit from heightened precision and quality, especially when it comes to specialized vocabulary.

Insights from the Development Team

Atsunori Shinoda, the head of T-400’s development team, remarked on the importance of this expansion: “With the addition of these languages to our high-accuracy mode, we can now offer top-tier translations to clients who had previously been limited by language choices. Leveraging our internal translation assets, we are committed to supporting international documentation and enhancing multilingual deployment scenarios.” He reiterated that the company would continue to expand language support based on customer feedback.

Future Outlook

Rosetta is dedicated to further enhancing the T-400 high-accuracy mode based on ongoing customer requests. The objective is to provide high-quality industrial translations across an even greater number of languages, ultimately aiming for improved productivity and a seamless business environment free from language constraints.

About T-400

T-400 stands out as a high-accuracy industrial translation AI, blending customization for technical documents with the fluency benefits of generative AI. Unlike conventional industrial and specialized translations, T-400 allows users to maintain their internal terminology while optimizing translation styles without the need for expensive dedicated engines. The service includes a “super high-accuracy (deep reflection)” mode that ensures near-complete automatic translation while drastically reducing correction rates, providing support for translation checking through highlighted segments.

For more information on T-400, check Rosetta's official website or sign up for a free trial.

Company Background

Metarial Group’s mission is to liberate people from constraints of place, time, and language. They are recognized as the number one in the domestic translation market share. With operations across diverse sectors, including law, medical, and manufacturing, they provide tailored AI development services to meet clients' unique challenges effectively.

To learn more about Metarial Group, visit their website.