Changing the language in Daily Prebuilt

Daily Prebuilt supports over a dozen languages. The language can be set at multiple levels — from a domain-wide default down to a per-participant override — using the lang property.

Supported language values

Value	Language
`"da"`	Danish
`"de"`	German
`"en"`	English (default)
`"es"`	Spanish
`"fi"`	Finnish
`"fr"`	French
`"it"`	Italian
`"jp"`	Japanese
`"ka"`	Georgian
`"nl"`	Dutch
`"no"`	Norwegian
`"pt"`	Portuguese (Portugal)
`"pt-BR"`	Portuguese (Brazil)
`"pl"`	Polish
`"ru"`	Russian
`"sv"`	Swedish
`"tr"`	Turkish
`"user"`	Matches the participant’s browser language (falls back to English if unsupported)

"no" (Norwegian) and "ru" (Russian) are only available in the current Daily Prebuilt UI.

Setting the language

There are four ways to set the language, listed here from lowest to highest priority.

1. Domain level (lowest priority)

Set a default language for all rooms on your domain via the domain configuration API:

curl --request POST \
  --url https://api.daily.co/v1/ \
  --header 'Authorization: Bearer $DAILY_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{"properties": {"lang": "fr"}}'

2. Room level

Override the domain default for a specific room:

curl --request POST \
  --url https://api.daily.co/v1/rooms/my-room \
  --header 'Authorization: Bearer $DAILY_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{"properties": {"lang": "de"}}'

You can also select a language when creating a room in the Daily dashboard.

3. Meeting token level

Set a per-participant language by including lang in meeting token properties:

curl --request POST \
  --url https://api.daily.co/v1/meeting-tokens \
  --header 'Authorization: Bearer $DAILY_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{"properties": {"room_name": "my-room", "lang": "jp"}}'

4. `setDailyLang()` (highest priority)

Call setDailyLang() at runtime to change the language dynamically. This overrides all other settings and is useful for building in-call language selectors:

call.setDailyLang('es');

You can also pass lang directly to createFrame():

const call = Daily.createFrame({ lang: 'nl' });

Priority order

When multiple levels are configured, the highest-priority setting wins:

setDailyLang() — highest
Meeting token lang
createFrame() property
Room-level lang
Domain-level lang — lowest

​Supported language values

​Setting the language

​1. Domain level (lowest priority)

​2. Room level

​3. Meeting token level

​4. setDailyLang() (highest priority)

​Priority order

Supported language values

Setting the language

1. Domain level (lowest priority)

2. Room level

3. Meeting token level

4. `setDailyLang()` (highest priority)

Priority order