Good ideas don’t only arrive in English.
You shouldn’t need to read a source’s language to find out whether it matters to you.
What other languages added
- German. The national snoring guideline and an independent test of 23 products gave the clearest answers to “what should I try first?”. Neither turns up easily in English searches.
- French. A manufacturer’s own page showed that its headline figure was about mouthpieces in general, not its model.
- Japanese. A 2026 survey of 300 nasal-strip users found most started because of a blocked nose; only about one in five started because of snoring. A trial listing gave us a lead whose results are unpublished.
- Chinese. Regional product pages showed that wording and disclaimers differ by market.
No non-English source has overturned the English-language evidence. We won’t pretend otherwise.
Honest boundaries
We don’t exclude a source because of its language, and we can’t promise to find every source worldwide. Translations and reports of the same study aren’t counted as new evidence. Our translations are AI-assisted; original links stay available so you can check them.
Original sources & their limits
- S3-Leitlinie: Diagnostik und Therapie des Schnarchens des Erwachsenen (AWMF, 2019) ↗
German national guideline on snoring in adults. Read with AI-assisted translation. Its current validity was not confirmed; it may be awaiting an update.
- Mittel gegen Schnarchen: 23 Produkte im Test (Stiftung Warentest, 2021) ↗
German independent consumer test, October 2021. None of 23 products reliably stopped snoring; it advises seeing a dentist or ENT doctor first. Individual product ratings are behind a paywall and were not read.
- Oscimed: SomnoFit-S, orthèse anti-ronflement (manufacturer, French) ↗
French version of the manufacturer page, read with AI-assisted translation. Same exclusions and general-appliance figure as the English page.
- 鼻腔拡張テープの利用実態調査（プレスリリース, 2026） ↗
Press release for an online survey of 300 people who had used nasal strips, run in February 2026. Issued by a company, Moon Moon Co., Ltd. Self-reported; not a clinical study.
- ブリーズライト：よくあるご質問 ↗
Japanese manufacturer FAQ, read with AI-assisted translation.
- 佐藤製藥（香港）：Breathe Right 通鼻貼 ↗
Hong Kong distributor page in Traditional Chinese. Includes a statement that the product is not intended to diagnose, treat or prevent disease.
- Japanese trial listing: UMIN000020662 ↗
Registry fields read in an earlier check. Marked completed, with results listed as unpublished. A listing is not a result.
- Beijing municipal health education page on snoring and obstructive sleep apnoea (Simplified Chinese) ↗
Public health education, read in an earlier check. We could not reopen it in our latest check to confirm the author. Not a study.
Sources checked 26 Oct 2026.