Feature request: Norwegian (nb / nn) language support

[byggmesterPRO]

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Summary

Please consider adding Norwegian to the supported languages in a future Supertonic release — ideally Bokmål (nb) first, with Nynorsk (nn) as a follow-up.

Why this gap stands out

Supertonic 3 already covers 31 languages, including all of Norwegian's closest neighbours:

• Danish (da) ✅
• Swedish (sv) ✅
• Finnish (fi) ✅
• Icelandic — not yet, but Norwegian is the conspicuous Nordic absence

Norwegian Bokmål is mutually intelligible with Danish in writing and shares most of its phoneme inventory with Swedish, so the marginal data/training cost should be small relative to languages already shipped. Skipping it leaves ~5M native speakers (plus a similar number of L2 readers across Scandinavia) without a usable on-device TTS option from Supertonic.

Use case

We are building an on-device Norwegian-language internal knowledge / voice-agent stack and have been evaluating Supertonic for the TTS layer because of its latency and on-device story. We currently have to fall back to either:

• Routing Norwegian text through da or sv (mispronounces kj, skj, retroflex flaps, and pitch accent — noticeably wrong to native ears), or
• A heavier cloud TTS, which defeats the on-device value proposition.

Suggested scope

1. Phase 1 — Bokmål (nb) support, single neutral voice style is fine for an initial release.
2. Phase 2 — Nynorsk (nn).
3. Optional: pitch-accent (tonelag) handling, since it's one of the things that distinguishes Norwegian from Swedish/Danish phonetically.

Possible data sources

Publicly available, permissively-licensed Norwegian speech corpora that may help:

• NB Tale (Nasjonalbiblioteket / National Library of Norway) — read speech, both dialects.
• NST Norwegian ASR Database — large, CC0-released via Språkbanken.
• Common Voice (nb-NO, nn-NO) — Mozilla, CC0.
• NPSC (Norwegian Parliamentary Speech Corpus) — Språkbanken.

Happy to help test a preview build on real Norwegian content if useful.

Thanks for the great work on v3!
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[juheo]

Hi @byggmesterPRO,

Thank you for the detailed request and for listing concrete Norwegian data sources.

We have received a few similar requests for Norwegian support recently, especially for Bokmål (nb). Another user also shared NbAiLab / Norwegian speech resources with us, and we are currently reviewing those internally.

Norwegian is not supported in the current Supertonic 3 release, and we do not have a confirmed ETA yet. But given the repeated interest and the availability of public datasets such as NB Tale, NST, Common Voice, and NPSC, we will consider Norwegian support for a future multilingual update.

If we make progress on nb or nn support, we’ll share an update in the repository.

Thanks again for the thoughtful suggestion and for offering to help test.