Collation Locales and Default Parameters

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Behavior
Supported Languages and Locales
Collation Default Parameters

Collation allows users to specify language-specific rules for string comparison, such as rules for lettercase and accent marks.

Behavior

Some collation locales have variants, which employ special language-specific rules. To specify a locale variant, use the following syntax:

{ "locale" : "<locale code>@collation=<variant>" }

For example, to use the unihan variant of the Chinese collation:

{ "locale" : "zh@collation=unihan" }

See the collation page for a full description of collation behavior and syntax.

Supported Languages and Locales

MongoDB's collation feature supports the following languages. The following table lists the supported languages and the associated locales as defined by ICU Locale ID. [1]

Language	Locale	Variants
Afrikaans	`af`
Albanian	`sq`
Amharic	`am`
Arabic	`ar`	`compat`
Armenian	`hy`
Assamese	`as`
Azeri	`az`	`search`
Bengali	`bn`
Belarusian	`be`
Bengali	`bn`	`traditional`
Bosnian	`bs`	`search`
Bosnian (Cyrillic)	`bs_Cyrl`
Bulgarian	`bg`
Burmese	`my`
Catalan	`ca`	`search`
Cherokee	`chr`
Chinese	`zh`	`big5han` `gb2312han` `unihan` `zhuyin`
Chinese (Traditional)	`zh_Hant`
Croatian	`hr`	`search`
Czech	`cs`	`search`
Danish	`da`	`search`
Dutch	`nl`
Dzongkha	`dz`
English	`en`
English (United States)	`en_US`
English (United States, Computer)	`en_US_POSIX`
Esperanto	`eo`
Estonian	`et`
Ewe	`ee`
Faroese	`fo`
Filipino	`fil`
Finnish	`fi`	`search` `traditional`
French	`fr`
French (Canada)	`fr_CA`
Galician	`gl`	`search`
Georgian	`ka`
German	`de`	`search` `eor` `phonebook`
German (Austria)	`de_AT`	`phonebook`
Greek	`el`
Gujarati	`gu`
Hausa	`ha`
Hawaiian	`haw`
Hebrew	`he`	`search`
Hindi	`hi`
Hungarian	`hu`
Icelandic	`is`	`search`
Igbo	`ig`
Inari Sami	`smn`	`search`
Indonesian	`id`
Irish	`ga`
Italian	`it`
Japanese	`ja`	`unihan`


Language	Locale	Variants
Kalaallisut	`kl`	`search`
Kannada	`kn`	`traditional`
Kazakh	`kk`
Khmer	`km`
Konkani	`kok`
Korean	`ko`	`search` `searchjl` `unihan`
Kyrgyz	`ky`
Lakota	`lkt`
Lao	`lo`
Latvian	`lv`
Lingala	`ln`	`phonetic`
Lithuanian	`lt`
Lower Sorbian	`dsb`
Luxembourgish	`lb`
Macedonian	`mk`
Malay	`ms`
Malayalam	`ml`
Maltese	`mt`
Marathi	`mr`
Mongolian	`mn`
Nepali	`ne`
Northern Sami	`se`	`search`
Norwegian Bokmål	`nb`	`search`
Norwegian Nynorsk	`nn`	`search`
Oriya	`or`
Oromo	`om`
Pashto	`ps`
Persian	`fa`
Persian (Afghanistan)	`fa_AF`
Polish	`pl`
Portuguese	`pt`
Punjabi	`pa`
Romanian	`ro`
Russian	`ru`
Serbian	`sr`
Serbian (Latin)	`sr_Latn`	`search`
Sinhala	`si`	`dictionary`
Slovak	`sk`	`search`
Slovenian	`sl`
Spanish	`es`	`search` `traditional`
Swahili	`sw`
Swedish	`sv`	`search`
Tamil	`ta`
Telugu	`te`
Thai	`th`
Tibetan	`bo`
Tongan	`to`
Turkish	`tr`	`search`
Ukrainian	`uk`
Upper Sorbian	`hsb`
Urdu	`ur`
Uyghur	`ug`
Vietnamese	`vi`	`traditional`
Walser	`wae`
Welsh	`cy`
Yiddish	`yi`	`search`
Yoruba	`yo`
Zulu	`zu`

Tip

To explicitly specify simple binary comparison, specify locale value of "simple".

[1]	To request support for a locale, please file a JIRA ticket with the Server project

Collation Default Parameters

A collation document contains several optional parameters in addition to the required locale parameter. Depending on which locale you use, the default parameters may be different. See the collation page for a full description of collation syntax.

The following default parameters are consistent across all locales:

caseLevel : false
strength : 3
numericOrdering : false
maxVariable : punct

The following table shows the default collation parameters which may vary across different locales:

Locale	caseFirst	alternate	normalization	backwards
`af`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`sq`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`am`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ar`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ar@collation=compat`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`hy`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`as`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`az`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`az@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`be`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`bn`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`bn@collation=traditional`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`bs`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`bs@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`bs_Cyrl`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`bg`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`my`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`ca`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ca@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`chr`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`zh`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`zh@collation=big5han`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`zh@collation=gb2312han`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`zh@collation=unihan`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`zh@collation=zhuyin`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`zh_Hant`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`hr`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`hr@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`cs`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`cs@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`da`	`upper`	`non-ignorable`	`FALSE`	`FALSE`
`da@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`nl`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`dz`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`en`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`en_US_POSIX`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`en_US`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`eo`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`et`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ee`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`fo`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`fo@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`fil`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`fi`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`fi@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`fi@collation=traditional`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`fr`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`fr_CA`	`off`	`non-ignorable`	`FALSE`	`TRUE`
`gl`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`gl@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`ka`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`de`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`de@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`de@collation=phonebook`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`de@collation=eor`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`de_AT`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`de_AT@collation=phonebook`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`el`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`gu`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`ha`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`haw`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`he`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`he@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`hi`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`hu`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`is`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`is@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`ig`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`smn`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`smn@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`id`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ga`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`it`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ja`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ja@collation=unihan`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`kl`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`kl@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`kn`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`kn@collation=traditional`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`kk`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`km`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`kok`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`ko`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ko@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`ko@collation=searchjl`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`ko@collation=unihan`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ky`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`lkt`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`lo`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`lv`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ln`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ln@collation=phonetic`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`lt`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`dsb`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`lb`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`mk`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ms`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ml`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`mt`	`upper`	`non-ignorable`	`FALSE`	`FALSE`
`mr`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`mn`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ne`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`se`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`se@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`nb`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`nb@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`nn`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`nn@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`or`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`om`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ps`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`fa`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`fa_AF`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`pl`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`pt`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`pa`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`ro`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ru`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`sr`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`sr_Latn`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`sr_Latn@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`si`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`si@collation=dictionary`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`sk`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`sk@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`sl`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`es`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`es@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`es@collation=traditional`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`sw`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`sv`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`sv@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`ta`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`te`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`th`	`off`	shifted	`TRUE`	`FALSE`
`bo`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`to`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`tr`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`tr@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`uk`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`hsb`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ur`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`ug`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`vi`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`vi@collation=traditional`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`wae`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`cy`	`off`	`non-ignorable`	`FALSE`	`FALSE`
`yi`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`yi@collation=search`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`yo`	`off`	`non-ignorable`	`TRUE`	`FALSE`
`zu`	`off`	`non-ignorable`	`FALSE`	`FALSE`

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