Open-Source TTS for Multilingual Help Center Audio
MOSS-TTS v1.5 is an 8B open-source candidate for help center articles that need controlled pronunciation across locales. MOSI Intelligence and OpenMOSS released it under Apache-2.0 on May 26, 2026. It supports 31 languages, zero-shot cloning, and controls for pronunciation, duration, and pauses. Official model page · v1.5 model card
Build on the published French example
The model card shows French synthesis with a language tag. The developers recommend providing the language when known and report stronger synthesis than v1.0 on almost all supported languages with tags. A help center team can test that setting while holding the localized script fixed. Developer documentation
For a proposed pilot, choose an article with French instructions and an English product name. Have a fluent reviewer verify every interface label against the actual screen. Save the version of the article and the interface together. Otherwise a perfectly pronounced but outdated menu label can still misdirect the listener.
| Route | Suitable input | Review |
|---|---|---|
| MOSS-TTS v1.5 | Localized single-voice article | Terminology and completeness |
| MOSS-TTSD | Script with several roles | Turn ownership |
| MOSS-TTS-Nano | CPU-oriented short audio | Latency and target-language quality |
The published 8B benchmark row reports 1.84% English WER and 1.37% Chinese CER. Use that evidence to plan an intelligibility test and measure help article corrections per locale on your own scripts. Benchmark table · 8B model card · Technical report
See the open-source TTS selection guide for broader evaluation criteria.
English SEO keywords
multilingual help center audio, open-source TTS, language tags.
Frequently asked questions
Does a language tag translate the script?
Supply approved localized copy before synthesis.
Can I use a single reference voice across locales?
Use authorized reference audio and review identity and pronunciation with fluent listeners.
What should the first pilot include?
Choose a real article containing numbers, a product name, and several interface labels.