sonic-pi

https://github.com/sonic-pi-net/sonic-pi

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Locale#set_app_language_tags

Set the language tags which is supported by the Application.
This value is same with supported_language_tags in Locale.candidates
to restrict the result but is the global setting.
If you set a language tag, the application works as the single locale 
application.

If the current locale is not included in app_language_tags,
Locale.default value is used.
Use Locale.set_default() to set correct language 
if "en" is not included in the language tags.

Set nil if clear the value.

Note that the libraries/plugins shouldn't set this value.

 (e.g.) Locale.set_app_language_tags("fr_FR", "en-GB", "en_US", ...)

Source | Google | Stack overflow

Edit

git clone [email protected]:sonic-pi-net/sonic-pi.git

cd sonic-pi

open app/server/ruby/vendor/locale-2.1.2/lib/locale.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Locale-set_app_language_tags-for-pr

# Commit to git

git add app/server/ruby/vendor/locale-2.1.2/lib/locale.rbgit commit -m "better docs for Locale#set_app_language_tags"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Locale-set_app_language_tags-for-pr

hub pull-request

# Celebrate!