0001 Support recipes in languages other than English

proposals/0001-support-recipes-in-any-language.md

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+# Support recipes in any language
+
+* Proposal: [0001-support-recipes-not-in-english](0001-support-recipes-not-in-english.md)
+* Authors: [Alexey Dubovskoy](https://github.com/dubadub)
+* Review Manager: TBD
+* Status: **Brainstorming**
+
+## Introduction
+
+Cooklang ecosystem should have unified support of recipes written in any language.
+
+## Motivation
+
+Cooklang gives a way to store recipes in a format that human and machine readable.
+Some languages (f.e. German, Finnish, many Slavic languages) would have ingredients
+in the middle of sentence to be in a modified form (check an examples on Wikipedia
+ https://en.wikipedia.org/wiki/Grammatical_case).
+
+That modified form will lead to creation of multiple entries for the same ingredient
+in a shopping list, while it's still the same ingredient and all amounts should be
+combined.
+
+
+## Proposed solution
+
+If config has locale set it should use one instead. In file `./config/main.conf` add line `locale = ru_RU`. Or simple `locale = ru`.
+
+Locale of recipe can be set in file name or metadata. Name file `Koldskål.da.cook`. Or in metadata set
+
+```
+>> locale: da_DK
+```
+
+- how to singularise ingredients and convert case to base when parsing
+- how to singularise units and convert case to base when parsing
+- how to pluralise units and ingredients when display with numbers (this can be done by Apple?)
+
+For many languages plural and singular form of an ingredient or unit will be different. To keep recipe readable
+
+https://unicode-org.github.io/cldr-staging/charts/latest/supplemental/language_plural_rules.html
+https://cldr.unicode.org/translation/grammatical-inflection
+
+Depending on the locale, there could be up to 6 plural forms used: zero, one, two, few, many, other.
+
+## Detailed design
+
+Describe the design of the solution in detail. If it involves new
+syntax in the language, show the additions and changes to the Cooklang
+grammar. If it's a new API, show the full API and its documentation
+comments detailing what it does. The detail in this section should be
+sufficient for someone who is *not* one of the authors to be able to
+reasonably implement the feature.
+
+## Effect on applications which use Cooklang
+
+App should guess locale from the system.
+
+### CookCLI (terminal and web-server)
+
+Does the proposal change the output of
+[CookCLI](https://github.com/cooklang/CookCLI)? Does it require adding
+a new sub-command to fully use this feature?
+
+### Mobile applications
+
+Does the proposal require changes in mobile application UI? Describe
+what screens should be changed and how. Give as much details as
+possible.
+
+## Alternatives considered
+
+Describe alternative approaches to addressing the same problem, and
+why you chose this approach instead.
+
+## Acknowledgments
+
+If significant changes or improvements suggested by members of the 
+community were incorporated into the proposal as it developed, take a
+moment here to thank them for their contributions. Cooklang evolution is a
+collaborative process, and everyone's input should receive recognition!