What is Lexicon Development?

Almost all natural language processing (NLP) applications rely on rich word lists, known as lexicons, to train their core algorithms. Using custom lexicons, machine learning systems can be programmed to conduct a variety of tasks. These tasks include content moderation, speech synthesis, sentiment analysis, and more. Especially when it comes to languages other than English, NLP systems require appropriately tagged lexicons to function correctly.

Our team of language experts can build and maintain comprehensive lexicons in over 300 languages and dialects. Let us help you develop a more robust language processing system.

Our Crowdsourcing Services

Ontology Creation

Our network of language specialists can help build domain-specific or language-specific ontologies based on your project requirements.

Pronunciation Dictionary Development

One of the core components of automatic speech recognition systems, a pronunciation dictionary enables systems to correctly pronounce words. Lionbridge’s language specialists can help build and expand pronunciation dictionaries in over 300 languages.

Corpora Generation

Lionbridge can create custom corpora for your specific application. Be it text, audio, images or videos, we can curate, annotate, and generate the dataset you need to develop and train your models. Our platform provides the environment, our experts provide decades of linguistic knowledge.

How it Works

how to crowdsource data

1. Project set-up

Our team will work with you to develop a custom solution based on your project objectives and timeline.

how to crowdsource data
how to crowdsource data

2. Production

Our crowd of multilingual experts get to work creating, annotating or validating your data.

how to crowdsource data
how to crowdsource data

3. Delivery

Our project management team checks, packages and formats the data before being sent to you for final approval.

how to crowdsource data

Why Lionbridge?

Linguistic Expertise

Lionbridge has built the world’s largest NLP team comprised of linguists, project managers, data engineers, and a global network of language experts. With over 20 years of experience, we’ve developed solutions for the world’s largest companies.


The Lionbridge quality assurance system features built-in validation, spot-checking and a worker seniority system. Our system ensures the highest quality of data production for machine learning applications.


Our project management team can work with you to create a tailored execution plan, ensuring that our team of experts completes your project according to your specific timeline and requirements.

1 million+ Contributors
300+ Languages
20+ Years of Experience

Proofing Tool Development Case Study

Learn how Lionbridge helped one of the world’s largest technology companies improve the accuracy of its grammar and spell checking system in over 16 languages.

  • 16+ Languages
  • 100+ Full-time Data Engineers
  • 300,000+ Hours of Work Completed



Solutions Lionbridge can Improve

Train your virtual assistant to respond to human speech in a variety of languages, environments, and contexts.
Improve the accuracy of your grammar and spell checker with meticulously tagged text data.
Improve accuracy for speech recognition systems using labeled speech data produced by a diverse set of speakers.