Add 639-5

README.md

@@ -10,7 +10,7 @@ While the data has initially been generated from standard sources, contributions
 
 ### Interpretation
 
-`tag3` and `tag1` columns represent the ISO 639-3 and -1 tags respectively. The `name` field is the "most recognisable" form of the language name, typically in English, to be used as a fallback where an autonym is not available.
+`tag3` and `tag1` columns represent the ISO 639-3 (or -5) and -1 tags respectively. The `name` field is the "most recognisable" form of the language name, typically in English, to be used as a fallback where an autonym is not available.
 
 The `autonym` field is the name of the language *in* that language. If this field is blank, it means that there is no confirmed autonym for this language in this database and you may use the `name` field as a fallback.
 
@@ -23,6 +23,7 @@ Here are the currently utilised sources by this table:
 - `cldr` - [Unicode Common Locale Data Repository](http://cldr.unicode.org/)
 - `ethnologue` - [Ethnologue](https://www.ethnologue.com/), only autonyms where specified.
 - `iso639-3` - [ISO 639-3](http://www.sil.org/iso639-3/), reference language names only.
+- `iso639-5` - [ISO 639-5](https://www.loc.gov/standards/iso639-5/id.php), reference language family names only.
 - `github` - [This repository](https://github.com/bbqsrc/iso639-databases)
 
 ## ISO 639 Default Script (ISO 15924) - iso639-default-script.tsv
@@ -51,6 +52,14 @@ The LCIDs used in this table are defined by [MS-OE376: 2.1.1906 Part 4 Section 7
 
 In effect, if a field is blank, it indicates that in BCP47 form, that segment should not be included to be equal to the given LCID. For example, `ar` is `1025`, while `ar-AE` is `14337`.
 
+## ISO 639-5 Language Families - iso639-5.json
+
+This table is sourced from the authoritative source, the [Library of Congress](https://www.loc.gov/standards/iso639-5/id.php).
+
+### Interpretation
+
+`tag5` represents the ISO 639-5 language family tag, `name` represents the English name of the language family, and `hierarchy` represents the hierarchy of the language family.
+
 # License
 
 Databases in many countries do not attract intellectual property rights, and where they do it, they very rarely attract copyright due to the raw and inexpressive nature of the data. However, to alleviate doubt, this data is being published by a resident of Sweden where sui generis database rights do not apply to non-EU datasets. CLDR and Ethnologue are both datasets published in the US, where database rights also do not apply.