|Phonetic transcription of a name.|
|Used on these elements|
|Status: in use|
|Tools for this tag|
This tag contains a phonetic guide to pronouncing the name contained in name=*. The name is transcribed into the International Phonetic Alphabet (IPA), either using a broad transcription or a narrow transcription.
This tag can be useful for clarifying an unintuitive pronunciation. For example, most places named Reading are pronounced like "redding" in English, not like "reeding". This pronunciation extends beyond places to the roads and points of interest named after them.
End users may benefit from seeing a pronunciation hint below a place’s label on a map, or from hearing the place name correctly read aloud while navigating with a routing application. Blind users also rely on software to read map features aloud. A renderer or geocoder can use an unambiguous phonetic transcription to automatically transliterate from an irregular orthography like English to another orthography. A geocoder can also use the phonetic transcription to generate "did you mean" results according to a phonetic algorithm.
This tag was first used in 2008 on various English place POIs.
As with name=*, an ISO 639 language code can be included in the key to specify the pronunciation in a particular language. For example, if a feature is tagged with name:en=* and name:fr=*, name:en:pronunciation=* and name:fr:pronunciation=* can indicate the pronunciation in English and French, respectively.
As an alternative to tagging a feature with a name:pronunciation=* tag, the wikidata=* tag allows you to associate a feature with the Wikidata item describing the same feature. That item can be tagged with an IPA transcription statement. However, note that Wikidata items are subject to different inclusion criteria than OpenStreetMap features.
Clients of these libraries can pass the transcription into any text-to-speech engine that supports IPA, which is the default phonetic alphabet of the Speech Synthesis Markup Language (SSML).  A number of text-to-speech engines support IPA transcriptions, including:
- Amazon Polly
- AVFoundation (IPA support built into iOS 10 and above)
- IBM BlueMix
- IBM Watson Text to Speech
- Nuance SpeechKit
Mapbox Navigation SDK for iOS v0.8 passes name:pronunciation=* data to Amazon Polly when that service is available. More recent versions also use this data when Polly is unavailable and AVFoundation is used instead.