Best Self Hosted Alternatives to LanguageTool

OmniPoly is a web frontend that centralizes translation and language-enhancement workflows. It integrates translation and grammar-checking backends and can optionally use LLMs to provide AI-driven insights and sentence extraction.

Key Features

• Text translation across multiple languages using an external translation backend
• Grammar and style checking via an external LanguageTool instance
• Optional LLM-powered analysis (Ollama) for sentiment, interesting-sentence extraction, and text modification
• File upload for batch translation and download of translated results
• Add words to a user dictionary for grammar checks and configurable language filters
• Docker and Docker Compose support with environment-variable configuration; UI hides features when their backend is not configured

Use Cases

• Translate and proofread emails, documents, or short texts while preserving grammar and style
• Extract and highlight interesting sentences or sentiment from translated text using an LLM
• Build a lightweight internal tool to unify translation, grammar checking, and simple AI text transformations

Limitations and Considerations

• OmniPoly is a frontend and requires external instances of LibreTranslate, LanguageTool, and/or Ollama to enable corresponding features
• Some features are only available when respective backend services and API keys are provided via environment variables

OmniPoly is suited for teams or individuals who want a single interface for translation and language quality workflows and who can provide the required backend services. It emphasizes configurable integrations and simple deployment via Docker.