This template is used on many pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Consider discussing changes on the talk page before implementing them.
The {{ISO 639 name}} template is used to resolve ISO 639-1, ISO 639-2, ISO 639-3 and ISO 639-5 codes to language names. It will trim extraneous IETF language tags to just the ISO 639 code. E.g.:
Sanskrit in Latin script, which IETF language tag is sa-Latn, renders as:
{{ISO 639 name|sa-Latn}} → Sanskrit error: sa-Latn is an IETF tag (help)
The error message can be suppressed with |hide-err=yes:
{{ISO 639 name|sa-Latn|hide-err=yes}} → Sanskrit
The rendered language name can be linked to the appropriate language article with |link=yes:
This template can be used to execute any of the functions exported by Module:ISO 639 name. These function are:
iso_639_code_exists – returns true if <code> is found in any of the ISO 639 data tables
iso_639_code_to_name – (default) as described above
iso_639_code_1_to_name – same as iso_639_code_to_name except constrained to the ISO 639-1 data table
iso_639_code_2_to_name – same as iso_639_code_to_name except constrained to the ISO 639-2 data table
iso_639_code_2B_to_name – same as iso_639_code_to_name except constrained to the ISO 639-2B data table
iso_639_code_3_to_name – same as iso_639_code_to_name except constrained to the ISO 639-3 data table
iso_639_code_5_to_name – same as iso_639_code_to_name except constrained to the ISO 639-5 data table
iso_639_name_exists – returns true if <name> is found in any of the ISO 639 data tables
iso_639_name_to_code – returns language code associated with <name>; may be constrained to a particular ISO 639 data table
iso_639 – returns language name when given a valid language code; returns a language code when given a valid language name; may be constrained to a particular ISO 639 data table
To use these functions set |fn= to the appropriate function name.
This template produces error messages. These messages are:
<code> is an IETF tag – IETF language tags are not ISO 639 language codes. When these tags are encountered, the template attempts to render the correct language and also emits this error message
ISO 639-<part> code is required – where <part> is 1, 2, 3, 5; template was called without the required language code
<code> is not an ISO 639-<part> code – <code> fails simple length validation; 639 part 1, language codes are two characters, for 639 parts 2, 3, and 5, language codes are three characters
<code> not found in ISO 639-<part> list – <code> not found after searching ISO 639-<part> data
The module that does the work for this template has other functionality not supported by this template. See Module:ISO 639 name. Error messages related to that other functionality are:
language name required – module function iso_639_name_to_code() only – this message emitted when a language name is not provided in the {{#invoke:}}
<part> not an ISO 639 part – module functions iso_639_name_to_code() and iso_639() only – this message emitted when <part> is not one of 1, 2, 3, or 5
language code or name required – module function iso_639() only – this message emitted when a language name or a language code is not provided in the {{#invoke:}}
