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This decision has been migrated to the Technical Council's Decision Log as part of a consolidation effort. See: DR-000012 - Localization parameter for back-end |
Background
To translate messages it returns a back-end API needs to know the locale of the client.
Example message: "No item with barcode {itemBarcode} exists", for details see https://wikifolio-org.folioatlassian.orgnet/wiki/display/I18N/How+To+translate+FOLIO
Example locale: de for German
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For details see
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This was discussed among front-end devs during multiple stripes-architecture meetings with conclusions in
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Decision
- Back-end modules shall read the HTTP Accept-Language header, as specified in RFC-7231 Section 5.3.5, to determine the desired locale of the response.
- The value is case insensitive (e.g.
deandDEare equivalent). - Multiple values may be present in a comma-separated list.
- Values may use weights in the range 0-1 appended to each value to indicate preference.
- Values without a weight shall be considered 1.0.
- Values with equal weights shall be considered to be ranked in descending order of preference.
- e.g.
de, en-gb;q=0.8, en;q=0.7
- Values may optionally include subtags (e.g.
de-DE).
- The value is case insensitive (e.g.
- The default value
en-USwill be used when a request lacks an Accept-Language header. - Unspecified functionality should follow established precedent, e.g RFC-4646 (tags for identifying languages), RFC-7231 (HTTP Accept-Language header), ISO 639-1 (two-letter language codes), etc.