Proofing tools enable users to write quickly and with accuracy by highlighting grammar, spelling, punctuation, word choice, and stylistic mistakes as they happen. Like other natural language machine learning applications, a great deal of linguistic and engineering resources is required to develop reliable proofing solutions in any language.

Accurate proofing tools rely on a wealth of annotated text data beneath the surface. From grammar rules to engineering support and quality assurance, Lionbridge has the linguistic experience and technical capabilities you need to take your proofing tool to the next level. Our team of experienced project managers and language experts have deep experience building natural language processing (NLP) applications from start to finish.

Our Services for Proofing Tool Development

Linguistic Annotation

Have a qualified crowd of native speakers identify and flag grammatical, phonetic, and semantic linguistic elements within text and audio. Whether you require part of speech tagging, phonetic transcription or semantic annotation services, Lionbridge is your home for linguistic annotation outsourcing


Grammar Creation

Lionbridge’s experienced team of project managers and computational linguists write and deploy clear syntactic rules for each language.

Ontology Creation

Our team of language experts analyze language trends on an ongoing basis. Keep your proofing tool up-to-date with regular updates to each language-specific glossary.

Our Annotation Platform

Power your proofing tool with meticulously tagged text data

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?


With 20 years of experience in providing professional crowdsourcing services, Lionbridge can quickly assign the most qualified workers to build your custom AI training datasets.


Lionbridge’s quality assurance system includes a rigorous review process to ensure that we provide accurate, high-quality training datasets for your machine learning projects.

Customizable Workflows

Need things done in a specific way under strict guidelines? We can work with you to make sure our team of experts gets your project done under your requirements and within your timeline.

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

Proofing Tool Data Pricing

How much does training a proofing tool cost?The Lionbridge platform streamlines much of the process, allowing us to offer one of the most cost-effective data solutions in the industry. Contact us to get a free estimate for your project.

  • Account Manager
  • Project Management
  • 24/7 Support
  • API
  • NDA
  • Volume pricing
  • Custom reporting
  • Enterprise-grade SLAs
  • Custom invoicing
  • Consulting services
Get in touch with our team today

Multilingual Data for Proofing Tool Development

Lionbridge provides professional text categorization services in over 300 languages. Some of our most popular languages include:

  • Chinese text data services
  • Dutch text data services
  • French text data services
  • German text data services
  • Italian text data services
  • Japanese text data services
  • Portuguese text data services
  • Spanish text data services

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