AI That Speaks Your Mother Tongue
VivaLyn Sathi is built for India's linguistic diversity. Choose your language during onboarding, and the entire experience adapts — the AI converses in your language, speaks in a native voice, understands your speech, and generates content in your mother tongue.
English, Hindi, Bengali, Tamil, Telugu & Marathi
Each language has a native neural voice, dedicated speech recognition, and full AI conversation support. Choose during onboarding — everything adapts automatically.
English
English · en-IN
Voice: NeerjaNeural
"Hello, I'm Sathi — your AI companion"
हिन्दी
Hindi · hi-IN
Voice: SwaraNeural
"नमस्ते, मैं साथी हूँ — आपका AI साथी"
বাংলা
Bengali · bn-IN
Voice: TanishaaNeural
"নমস্কার, আমি সাথী — আপনার AI সঙ্গী"
தமிழ்
Tamil · ta-IN
Voice: PallaviNeural
"வணக்கம், நான் சாத்தி — உங்கள் AI தோழன்"
తెలుగు
Telugu · te-IN
Voice: ShrutiNeural
"నమస్కారం, నేను సాథీ — మీ AI సహచరుడు"
मराठी
Marathi · mr-IN
Voice: AarohiNeural
"नमस्कार, मी साथी — तुमचा AI सोबती"
Not Just Translation — Native Experience
This is not a translated English app. Each language has been integrated at every layer of the system — from speech recognition to content generation.
Speech Recognition
Whisper AI with language-specific hints for accurate transcription. Understands code-mixing when you naturally switch between languages.
Text-to-Speech
Native-speaker Microsoft Neural voices for each language. Real native pronunciation with natural prosody, rhythm, and intonation.
AI Conversation
The LLM receives your language preference and responds naturally. Ask in Hindi, get a thoughtful reply in Hindi.
Content Generation
Diary entries, story narratives, and wellness insights generated in your chosen language. Your AI diary writes in your mother tongue.
UI Translations
Interface labels, buttons, onboarding screens, and navigation translated with a centralised i18n system covering the complete experience.
Date & Number Formatting
Locale-aware formatting (BCP-47) ensures dates, numbers, and currency display correctly for your region.
Choose Once. Everything Adapts.
During onboarding, you see all six languages with native names and a sample greeting. Choose your language, and the entire app configures automatically.
STT Language Hint
Speech recognition is optimised for your language — Whisper receives the correct language hint for maximum accuracy.
TTS Voice Mapping
The correct native neural voice is selected — NeerjaNeural for English, SwaraNeural for Hindi, and so on.
AI Persona Language
The conversational AI responds naturally in your language. Ask in Tamil, get thoughtful replies in Tamil.
Full UI Adaptation
Interface labels, buttons, content generation, and date/number formatting all adapt to your language and locale.
Code-Mix Naturally. Sathi Gets It.
India is bilingual. Even when you select Hindi, the AI recognises when you speak English words or switch languages mid-sentence. Whisper's multilingual model handles English natively even with a non-English language hint — so you can naturally code-mix without losing accuracy.
Natural Code-Mixing
"Mujhe tomorrow ka meeting remind karwa do" — Sathi understands seamlessly, even when Hindi and English words are mixed in the same sentence.
No Language Lock-In
Switch between languages mid-conversation. Start in Hindi, ask a question in English, continue in Hindi. Sathi follows your natural speech pattern.
Speak Your Language. Sathi Understands.
Download VivaLyn Sathi and experience an AI that speaks your mother tongue with native fluency — not a translated English robot.