Slate™ Toolkit Edition

Slate Toolkit Edition Logo


Slate™ Toolkit Edition is a collection of free open source software utilities. These utilities generate and use phrase-based statistical machine translation (SMT) models in our commercial Slate™ products. This makes Slate™ Toolkit Edition the only collection of SMT utilities updated to run on MS Windows.

Getting Started

Lengthy command lines from the various open source utilities can be error-prone. Therefore, this toolkit includes Windows .cmd and Bash .sh shell scripts, plus a very small sample training corpus. These do not constitute a production-ready environment. Rather, they demonstrate the open source command lines for essential steps that prepare corpora, train & tune models and translate text.

The demo-all script is the best place to start. Just run it in-place.

Outputs from upstream scripts become the inputs to downstream scripts. Therefore, the script names are numbered in the order to follow when you run them individually. The order is also referenced in the demo-all script.

Supported SMT Utilities

Support for open source utilities maintains cross-platform functionality of phrase-based “mode” of SMT. Factored phrase-based, hierarchical and other SMT modes might work, but are not tested or supported.

Supported SMT Features

Support for phrase dictionary, lexical reordering, language modeling and other advanced features is maintained through the supported utilities.

Unsupported Utilities & Features

Open source utilities and features that are not used in our commercial products are either missing or untested, and therefore unsupported. This collection distributes all utilities under their respective open source licenses without warranty. The README file has more details.



Support for 30 languages in any combination. With your TMs, create engines that translate between all possible language pairs.

Sample Translation Memories

Sample translation memories and other files to help you practice and learn.

Software Development Tools

Slate Toolkit Edition is the kernel that drives our proprietary applications. A skilled software engineer can use it to create their own programs with features like these.

  • Organize Translation Memories
  • Build Customized Engines
  • Evaluate Engines
  • Deploy Engines
  • Pre-Translate Files
  • Plugins Connect to CAT Tools
  • Forced Terminology
  • Terminology On-The-Fly
  • Weighted Updates
  • Backup & Restore


You need to provide the following before working with Slate Toolkit Edition.

Hardware System Requirements
  • Intel Core i3 (i7 recommended) or AMD Athlon 64 CPU (4-core x86-64, 2.4 GHz or faster)
  • 4 GB of RAM (8 GB recommended)
  • 2 GB of free hard-disk space for installation
  • 250 GB (or more) of additional free space on a high-performance drive is required after installation
Windows Operating System (Option)
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  • Windows 7 64-bit Edition with Service Pack 1
  • Windows 8 or 8.1 64-bit Edition
  • Windows 10 64-bit Edition
  • 32-bit Editions not supported
Linux Operating System (Option)
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  • Ubuntu 16.04 or newer (other Debian-based on request)
  • CentOS/RHEL-based (other RPM-based on request)
MacOS Operating System (Option)
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  • To be determined, currently unsupported
Translation Memories

Personalized engine:

  • 70,000 to 150,000 sentence segments
  • One full-time translator’s work for 3 to 4 years

Customized engine:

  • 200,000 to 500,000 sentence segments
  • Support a team of translators
  • No upper limit number of segments
  • Too many segments risks degrading the engine
File Types

SlateToolkit can use these file types:

  • Text files with UTF-8 character encoding, Linux or Windows new line separators
  • Tab-delimited files are specialized Text file (as above) with one tab per line. Text left of the tab is the source language. Text right of the tab is target language.

The Slate installer provides and manages the following requirements.

GNU Utilities

The GNU Utilities are essential open source utilities that the Moses Toolkit needs to create models. The Windows package installs and updates them but we do not maintain them.

Perl Scripting Runtime

Perl 64-bit version 5.28 or newer is a free open source scripting runtime environment.

Python Scripting Runtime

Python 64-bit version 3.72 or newer is a free open source scripting runtime environment. Required dependency libraries include: pip, pywin32, six, numpy, nltk, lxml, regex, polib, jieba, PyArabic, tinysegmenter3, hazm, wxPython


Open Source Licenses

Open Source software components from many different projects written by many authors and contributors are distributed under their respective open source licenses. In turn, they can have sub-components from different sources that could be licensed differently.

Multiple Platforms
MacOS Logo
Linux Logo
Windows 10 Logo

Install and activate on any supported operating systems. Today’s support includes MS Windows and Linux. MacOS is planned.

Free Open Source

You may redistribute this package and its utilities freely under their respective open source licenses. The price is a modest fee for packaging and distribution.

Open Source

Slate Demo

Shell scripts (Windows .cmd files and Bash .sh files) and a sample training corpus to demonstrate native Moses and MGIZA++ utilities.


MGIZA++ is an essential open source utility that is the Moses Toolkit uses to create SMT models.

Moses Decoder

The decoder is the utility that converts source to target text using SMT models created by the toolkit.

Moses Toolkit

The toolkit is a collection of open source utilities, derived from the original Moses open source project, that create SMT models.

GNU Utilities

The GNU Utilities are essential open source utilities that the Moses Toolkit needs to create models. The Windows package installs and updates them but we do not maintain them.

Social Sharing Discounts

A win-win-win. You get 10% off at checkout. Your colleagues learn about Slate. We lower the price with lower advertising expenses. Thank you!