Developer builds lightweight library to fix punctuation in speech-to-text output without AI

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A developer has released 'sentencify', a small JavaScript library designed to automatically correct punctuation and capitalization in raw speech-to-text and LLM-generated text. The tool addresses a common problem where transcribed speech lacks proper formatting, such as missing capital letters and end punctuation. Rather than routing text back through an AI model — which adds latency, cost, and unpredictability — sentencify uses ordered regular expressions to classify sentences as declarative, interrogative, or exclamatory. The library currently supports six languages including English, Spanish, French, German, Portuguese, and Japanese, each with language-specific punctuation rules. It requires no dependencies and works synchronously, making it a lightweight alternative for developers handling unformatted text output.

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