Currency abbreviations #81

davinov · 2019-11-29T11:06:54Z

Hi,
I found the use case described in #71 quite common, and I agree that replacing the SI-prefixes is just a workaround, not a definitive solution. Therefore, I worked a bit to add a K type that will use common currency abbreviations (K for thousands, M for millions, B for billions, T for trillions). It reuses the logic of the s type, with the small difference that the count of abbreviations can vary with the locale.

The abbreviations can be customized in locale definition under the property currencyAbbreviations, so the billion B in US would become bn is GB.
Their count can also vary : in French, there is no abbreviation for trillions (T), so 1.22T will be formatted as 1220Mrds (Mrds being the french abbreviation for billions).

Closes #71

Liggliluff · 2020-02-01T19:02:02Z

Just a slight thing. CLDR disagrees on your point about French.
The French abbreviations for the magnitudes K, M, B, T are k, M, Md, Bn
"1.22T" would be formatted as "1,22 Bn" in French.

CLDR don't contain it, but theoretically it continues with: Bd, Tn, Td

Liggliluff · 2020-02-01T19:20:41Z

Second thing; the east Asian languages; Korean, Japanese and Chinese (and possibly more) uses groupings of 4. So the following:
1, 10, 100, 1K, 10K, 100K, 1M, 10M, 100M, 1B, 10B, 100B, 1T, 10T, 100T
Would in Chinese be:
1,10,100,1000,1万,10万,100万,1000万,1亿,10亿,100亿,1000亿,1兆,10兆,100兆

And like for French, the continuation that is excluded in CLDR: 京, 垓, 秭, 穰, 沟, 涧, 正, 载

Then you also got the Hindi pattern:
1, 10, 100, 1t, 10t, 1l, 10l, 1c, 10c, 1a, 10a, 1k, 10k, 1n, 10n*
* Latin characters only used as a placeholder

davinov · 2020-02-04T09:37:31Z

Just a slight thing. CLDR disagrees on your point about French.
The French abbreviations for the magnitudes K, M, B, T are k, M, Md, Bn
"1.22T" would be formatted as "1,22 Bn" in French.

CLDR don't contain it, but theoretically it continues with: Bd, Tn, Td

Thanks for pointing the CLDR, it should effectively be the reference for this implementation !
I found the Mio/Mrds ones on publications.europa.eu/code/fr/fr-5000300.htm, which seem quite an official source, yet the CLDR is much more complete and have a specification for many more languages.
I'll take some time to update the PR with the CLDR reference :)

However, I'm note sure we should implement the continuation if the CLDR doesn't indicate it. Shouldn't we stick with the standard?

Liggliluff · 2020-02-04T11:05:03Z

You should certainly stick to the CLDR, that is the best bet. Then everything will appear as expected, between d3-format and CLDR.

I can see the CLDR terminating at T/Bn because there's no proper abbreviation of quadrillion in English; Q could be used, but it can be mixed up with quintillion, so that's where the single letter unambiguous list ends. CLDR is primarily made by American English speaking people (that's why "en" and not "en-US" is American English, and "en-001" where "001" stands for every single country on earth with no exception, excludes countries using American English in CLDR). Otherwise we might have seen Bd, Tn, Td in French, as that's a very logical continuation. ... But that's me ranting at stupid decisions in CLDR xD

Fil · 2020-06-04T10:27:53Z

Two reservations re: the proposed French locale (on top of @Liggliluff’s).

a non-breaking space would be needed between the number and the suffix, but the suffix can be reattached: i.e. it should be "1 k€" rather than "1k €" (* though CLDR seems to have a weird extra space, as "1 k €").
kilo-euros are really upsetting with higher precision ( 1234€ becomes "1,234 k€", which I can't help but read as "1 million euros"); we might use 1 k€ or 1 234 €, but not a mix.

I'm not sure how these remarks might apply to other languages.

A few refs.:

French "Imprimerie nationale" typo guide, pages 9 and 118.
CERN typo guide, page 17.
the relevant CLDR extract (from core/common/main/fr.xml)

davinov · 2020-06-08T08:08:50Z

Thanks for the feedback and references! I'll try to take this into account in my spare time soon.

These functons will be used todetermine which prefixes will be used when formatting currencies. Common prefixes are for thousands (K), millions (M), billions (B) and trillions (T).

Implement en, fr, de, es, it and ln locales See https://github.com/PrestaShop/PrestaShop/blob/develop/localization/CLDR/core/common/main/<locale>.xml for reference

davinov · 2020-06-20T12:26:44Z

I took some minutes to stick to CDLR for en, fr, it, es, de, and nl locales (76c6681), and rebase the PR.
However:

I did not have a look to languages that have other than 3-digits grouping
I didn't implement the reattachment of the currency symbol for some of them

Fil

note: merged with #70 into #96.

curran · 2020-07-07T16:30:32Z

locale/en-GB.json

@@ -2,5 +2,6 @@
  "decimal": ".",
  "thousands": ",",
  "grouping": [3],
-  "currency": ["£", ""]
+  "currency": ["£", ""],
+  "currencyAbbreviations": ["", "K", "M", "B", "T"]


From Language Matters: Millions, Billions and Other Large Numbers

The most commonly seen short forms for thousand, million, billion and trillion in North America and the United Kingdom, respectively, are outlined in the table below.

Might we consider changing locale/en-GB.json to match these?

"currencyAbbreviations": ["", "k", "m", "bn", "tn"]

changed in #96

Thanks for adding these. I removed them from this PR originally (7ee5a2c) because they are not indicated in the CDLR, but I think they should be!

per #81 (comment)

curran · 2020-07-08T14:49:57Z

Suggest to close this in favor of #96

Fil · 2020-07-10T16:42:21Z

closed in favor of #96

davinov changed the title ~~Currency prefixes~~ Currency abbreviations Nov 29, 2019

davinov added 7 commits June 20, 2020 13:49

Add formatCurrencyPrefix and currencyPrecisionPrefix

e249b2e

These functons will be used todetermine which prefixes will be used when formatting currencies. Common prefixes are for thousands (K), millions (M), billions (B) and trillions (T).

Introduce K type for currency prefix

d1ed244

Documentation for type K and associated methods

fad5de7

Allow currency abbreviations in locale definition

3fa19c7

dd currency abbreviations for en-GB

7ee5a2c

Some type K abbreviations can be omitted in locale

a0de748

Use CLDR for currencyAbbreviations

76c6681

Implement en, fr, de, es, it and ln locales See https://github.com/PrestaShop/PrestaShop/blob/develop/localization/CLDR/core/common/main/<locale>.xml for reference

davinov force-pushed the currency-prefixes branch from e03ec09 to 76c6681 Compare June 20, 2020 12:16

Fil mentioned this pull request Jul 7, 2020

Implement Binary prefix, Currency prefix (Merge #70 #81) #96

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Fil approved these changes Jul 7, 2020

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curran mentioned this pull request Jul 7, 2020

Add SI-like currency format directive? #71

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Fil added a commit that referenced this pull request Jul 7, 2020

british currencyAbbreviations

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per #81 (comment)

Fil closed this Jul 10, 2020

soerenwolfers mentioned this pull request Jan 21, 2022

enable formatting numbers with natural language suffixes, k(ilo), M(illion), B(illion) plotly/plotly.js#6091

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Currency abbreviations #81

Currency abbreviations #81

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Currency abbreviations #81

Currency abbreviations #81

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