Custom.MTCustom Machine Translation

Trados logo Machine Translation Platform for Trados

Connect over 30 customized, stock, and open-source machine translation models to your favorite CAT tool

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See how it works

Power your Trados Studio with leading machine translation brands

PangeaMT
Google
Tencent
LanguageWire logo
Globalese
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Yandex
XL8
ModernMT
Microsoft
OpenAI GPT
Amazon
Systran
DeepL

You can add any MT provider at no extra cost. 

Email us to info@custom.mt

Save Time Using One Plugin

This multi-engine connector works with every machine translation brand, so there is no need to download, install and configure a new plugin for each new machine translation brand.

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Get the Best Quality and Accuracy

Best-fit machine translation models perform significantly better. Pick the best MT engine for your language and domain with our Best-Engine Automated Tool.

Manage Machine Translation effectively

As the machine translation leads to working with a linguistics team you will be able to eliminate the pain of switching between different MT plugins for multiple users. MT management has never been this easy. 

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Connect Your Custom Models

The plugin, supported by a development team, brings the ability to connect custom models from any brand. This includes open-source models, for example, Facebook NLLB200, Helsinki NLP and Marian NMT

Get advanced features in Trados Studio

10+ new customized 

and stock engines

Real-time detailed

statistics

Glossary support 

for DeepL

Customized domains for your 

translation projects

Open-source models, e.g. Marian and M2M-100/Facebook

Backup engines for
workflow continuity

Ready to try?

Start with creating your Custom.MT Platform account!

Create the account

How it works

Download the plugin for free from the RWS Appstore

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Sign up in Custom.MT Console and get your API Key

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Set up your customized engines and templates

Start using your translation templates in Trados

Use ChatGPT to translate in Trados

Plans and Pricing

Starter Edition

€

200

monthly

For small translation teams and LSP

Volume included

  • 10M characters per month
  • 10 workflow templates
  • €20 per mln characters after the limit

Features

  • 30+ NMT & LLM models
  • AI Terminology
  • TMS plugins & extensions (basic)
  • Best Engine (auto model selection)
  • APE (Automatic pre/post-editing)

Note:

The usage of machine translation APIs and GenAI tokens is charged on top of the platform fees. Pricing.

Start Free Trial

Advanced Edition

€

1000

monthly

Teams that localize over 10 million target words per year

Volume included

  • 30M characters per month
  • 50 workflow templates
  • €40 per mln characters after the limit

Features

  • 30+ NMT & LLM models
  • AI Terminology
  • TMS plugins & extensions (advanced)
  • Best Engine (auto model selection)
  • APE (Automatic pre/post-editing)
  • Prompt Studio
  • Quality Estimation(base)
  • API access for integrations
  • Consulting(optional)

Note:

The usage of machine translation APIs and GenAI tokens is charged on top of the platform fees. Pricing.

Start Free Trial

Compliance Edition

€

2500

monthly

Large businesses with compliance requirements

Volume included

  • 50M characters per month
  • 100 workflow templates
  • €50 per mln characters after the limit

Features

  • 30+ NMT & LLM models
  • AI Terminology
  • TMS plugins & extensions(advanced)
  • Best Engine (auto model selection)
  • APE (Automatic pre/post-editing)
  • Prompt Studio
  • Quality Estimation(base)
  • TMX Cleaner
  • Team Performance Dashboard
  • Base Security Public + Tokenization (Optional)
  • Advanced Security (VPC)(optional)
  • Full Security (On-Prem + NMT/LLM)(optional)
  • DTP Portal
  • API access for integrations
  • Open-source orchestration(optional)
  • Automation beyond translation (AI workflows)(optional)
  • Consulting(optional)

Note:

The usage of machine translation APIs and GenAI tokens is charged on top of the platform fees. Pricing.

Book a Call

Frequently Asked Questions

1. What is the Custom.MT Trados Connector and how does it work?

The Custom.MT Trados Connector is a powerful machine translation plugin for Trados Studio (note: it does not currently support Trados Enterprise or WorldServer), giving teams access to over 30 MT engines and large language models (LLMs) through one unified interface. Designed for enterprise-scale translation workflows, Custom.MT allows organizations to manage multiple projects, language pairs, and templates efficiently, while maintaining consistent translation quality across all users.

2. Do I need to install anything to use Custom.MT with Trados Studio?

Yes. To get started:

  1. Install the free Custom.MT plugin from the RWS AppStore.
  2. Log in to your Custom.MT Console and connect your API key.
  3. Choose a machine translation template and start translating directly in Trados Studio.

All setup instructions, credentials, and detailed documentation for using Custom.MT with Trados Studio are available here. This includes guidance on plugin installation, API key setup, translation templates, and workflow configuration, making it easy for localization teams to deploy and manage machine translation across multiple projects and translators.

3. Which versions of Trados Studio are supported by the Custom.MT plugin?

The plugin supports Trados Studio 2019 through 2024, with full support for Trados 2022 and 2024.

  • Using supported versions ensures reliable performance for large-scale projects and enterprise workflows.
  • Always refer to the RWS AppStore plugin documentation for compatibility updates.
4. What MT engines and AI models can I use with the Trados Connector?

Custom.MT allows you to access more than 30 MT engines and LLMs, including:

  • Popular providers like DeepL, Google Translate, and OpenAI GPT models.
  • Your own custom-trained MT models.
  • All engines are managed through Custom.MT, so teams don’t need separate accounts for each provider.

Note: ChatGPT-5 is not recommended for Trados due to performance limits; GPT-4 and GPT-4o models work reliably.

5. How does glossary and terminology support work inside Trados?

Custom.MT supports terminology enforcement:

  • Upload your glossary into a translation template in Custom.MT.
  • All translations returned in Trados will comply with your glossary terms.
  • Maintains uniform terminology for multiple translators and teams.
6. Can I connect my own custom-trained MT models to Trados using Custom.MT?

Yes. With Custom.MT, you can link your custom-trained MT engines or fine-tuned models directly in the Custom.MT Console. Once added to a template, these models are fully available in Trados Studio, letting you translate using proprietary or specialized engines without any extra configuration. Custom.MT handles all routing, ensuring reliable output across multiple teams and projects.

7. Do linguists need separate Custom.MT accounts when working in Trados?

No. A single Custom.MT Console account is sufficient for your entire localization team. Linguists can work directly in Trados Studio using templates and API keys from the main account, without individual logins. This setup allows multiple linguists or teams to collaborate efficiently, while keeping project settings, translation rules, and engine access aligned for all users.

8. How does Custom.MT protect my translation data in Trados Studio?

Custom.MT provides enterprise-grade security and data privacy for all projects in Trados Studio.

  • Translation content is processed in real time and not stored.
  • Third-party MT providers (DeepL, OpenAI, Google) comply with their privacy and security policies.
  • All translation workflows, templates, and API access are centrally managed in the Custom.MT Console, giving organizations full control over user access and compliance for enterprise translation operations.