Rasa Paraphraser

What Rasa Paraphraser is

Rasa Paraphraser generates sentence alternatives intended to keep a similar meaning while changing wording and structure. It was built primarily for data augmentation within the Rasa Open Source framework, though it can also serve other paraphrasing needs. Its multilingual neural machine translation model comes from the Prism framework and includes changes to encourage diversity in outputs. The model supports 30 languages, but the README says the tool has only been tested in English, German, French, Spanish, and Russian. Users can generate text interactively from the command line or process files in bulk. Bulk input accepts Rasa NLU training data or CSV rows with a sentence and optional label; output can use Rasa NLU format or CSV and includes similarity scores. Command-line settings control language, lexical diversity, n-gram penalization, beam search, and candidate count. Docker is required, with CPU and GPU container builds and runs documented. A lightweight mode is described as around 2.5 times faster, with a possible effect on generation quality. The tool is free and MIT-licensed.