Langua vs Sotto

Langua is an AI language tutor for conversation practice, with instant feedback and access to practice at any time. Learners can use roleplays, debates, vocabulary exercises and conversations tailored to their interests. Feedback options include correction styles, grammar drills, conversation reports, audio summaries and transcripts with words available for translation. Learners can save vocabulary, review it with spaced-repetition flashcards and create stories featuring saved words. Langua also offers level-matched podcasts and videos, plus the option to import personal content with interactive transcripts synchronized to audio. It lists 23 languages, with multiple dialects available for many. A conversation can be started without subscribing. The Free plan includes approximately 20 standard chat messages per week and 3 minutes of Call Mode per day. A Pro trial requires a card and lasts 5 days on a monthly plan or 7 days on an annual plan. Subscriptions work on web, iOS and Android, with progress synced across devices. Langua recommends Google Chrome for web use. Its privacy policy says users can delete chat transcripts, and voice recordings are not stored unless enabled in Settings.

Sotto is open-source, self-hosted language-learning software for structured CEFR courses and private practice. Its course covers grammar, reading, listening, speaking, and writing, with advancement tied to demonstrated mastery; separate practice is not gated by course progression. A vocabulary and grammar memory graph uses SM-2 spaced repetition to schedule reviews and help shape adaptive listening. Learners can build classes from articles, papers, YouTube links, or topics, with material leveled to a CEFR course and citations provided. Configurable AI and speech services include OpenAI, Anthropic, Ollama, faster-whisper, and Kokoro; Gemini Live supports spoken translation. The application, database, and files run on the operator’s own stack, and the maker documents an offline setup using the learner’s hardware. Access options include a browser-installable PWA, a desktop launcher for macOS, Windows, and Linux, a terminal client, and workbook PDFs for iPad annotation. Sotto is free to run under AGPL-3.0, but users pay configured AI and speech providers directly. Content sent to cloud providers is subject to those providers’ terms.