Translation setup and layout

[brunobord]

Based on what @Natim did on #441

refs #119

• workalendar/africa/algeria.py
• workalendar/africa/angola.py
• workalendar/africa/benin.py
• workalendar/africa/ivory_coast.py
• workalendar/africa/madagascar.py
• workalendar/africa/sao_tome.py
• workalendar/africa/south_africa.py
• workalendar/america/argentina.py
• workalendar/america/barbados.py
• workalendar/america/brazil.py
• workalendar/america/canada.py
• workalendar/america/chile.py
• workalendar/america/colombia.py
• workalendar/america/mexico.py
• workalendar/america/panama.py
• workalendar/america/paraguay.py
• workalendar/asia/china.py
• workalendar/asia/hong_kong.py
• workalendar/asia/israel.py
• workalendar/asia/japan.py
• workalendar/asia/malaysia.py
• workalendar/asia/qatar.py
• workalendar/asia/singapore.py
• workalendar/asia/south_korea.py
• workalendar/asia/taiwan.py
• workalendar/core.py
• workalendar/europe/austria.py
• workalendar/europe/belgium.py
• workalendar/europe/belarus.py
• workalendar/europe/bulgaria.py
• workalendar/europe/cayman_islands.py
• workalendar/europe/croatia.py
• workalendar/europe/cyprus.py
• workalendar/europe/czech_republic.py
• workalendar/europe/denmark.py
• workalendar/europe/estonia.py
• workalendar/europe/european_central_bank.py
• workalendar/europe/finland.py
• workalendar/europe/france.py
• workalendar/europe/germany.py
• workalendar/europe/greece.py
• workalendar/europe/hungary.py
• workalendar/europe/iceland.py
• workalendar/europe/ireland.py
• workalendar/europe/italy.py
• workalendar/europe/latvia.py
• workalendar/europe/lithuania.py
• workalendar/europe/luxembourg.py
• workalendar/europe/malta.py
• workalendar/europe/netherlands.py
• workalendar/europe/norway.py
• workalendar/europe/poland.py
• SPECIAL CASE: workalendar/europe/portugal.py -- Portugal holiday labels are already written in Portuguese. Maybe we'll need to make a translation ping-pong when we're ready, to set all labels in English and copy their translations in the pt-PT files.
• workalendar/europe/romania.py
• workalendar/europe/russia.py
• workalendar/europe/scotland/mixins/autumn_holiday.py
• workalendar/europe/scotland/mixins/fair_holiday.py
• workalendar/europe/scotland/mixins/spring_holiday.py
• workalendar/europe/scotland/mixins/victoria_day.py
• workalendar/europe/serbia.py
• workalendar/europe/slovakia.py
• workalendar/europe/slovenia.py
• SPECIAL CASE: workalendar/europe/spain.py -- Spain holiday labels are already written in Spanish. Same as for Portugal...
• workalendar/europe/sweden.py
• workalendar/europe/switzerland.py
• workalendar/europe/turkey.py
• workalendar/europe/ukraine.py
• workalendar/europe/united_kingdom.py
• workalendar/oceania/australia.py
• workalendar/oceania/marshall_islands.py
• workalendar/oceania/new_zealand.py
• workalendar/usa/alabama.py
• workalendar/usa/alaska.py
• workalendar/usa/american_samoa.py
• workalendar/usa/arizona.py
• workalendar/usa/arkansas.py
• workalendar/usa/california.py
• workalendar/usa/colorado.py
• workalendar/usa/connecticut.py
• workalendar/usa/core.py
• workalendar/usa/delaware.py
• workalendar/usa/district_columbia.py
• workalendar/usa/florida.py
• workalendar/usa/georgia.py
• workalendar/usa/guam.py
• workalendar/usa/hawaii.py
• workalendar/usa/idaho.py
• workalendar/usa/illinois.py
• workalendar/usa/indiana.py
• workalendar/usa/iowa.py
• workalendar/usa/kansas.py
• workalendar/usa/kentucky.py
• workalendar/usa/louisiana.py
• workalendar/usa/maine.py
• workalendar/usa/maryland.py
• workalendar/usa/massachusetts.py
• workalendar/usa/michigan.py
• workalendar/usa/minnesota.py
• workalendar/usa/mississippi.py
• workalendar/usa/missouri.py
• workalendar/usa/montana.py
• workalendar/usa/nebraska.py
• workalendar/usa/nevada.py
• workalendar/usa/new_hampshire.py
• workalendar/usa/new_jersey.py
• workalendar/usa/new_mexico.py
• workalendar/usa/new_york.py
• workalendar/usa/north_carolina.py
• workalendar/usa/north_dakota.py
• workalendar/usa/ohio.py
• workalendar/usa/oklahoma.py
• workalendar/usa/oregon.py
• workalendar/usa/pennsylvania.py
• workalendar/usa/rhode_island.py
• workalendar/usa/south_carolina.py
• workalendar/usa/south_dakota.py
• workalendar/usa/tennessee.py
• workalendar/usa/texas.py
• workalendar/usa/utah.py
• workalendar/usa/vermont.py
• workalendar/usa/virginia.py
• workalendar/usa/washington.py
• workalendar/usa/west_virginia.py
• workalendar/usa/wisconsin.py
• workalendar/usa/wyoming.py

Wider checklist

• Tests should be all green
• Changelog amended with a mention describing your changes. Note Please do NOT change the version number here. It's the project maintainers' duty.
• Amend documentation in the "how to contribute" tutorial,
• Amend the github pull-request template to incite developers to add the translation mechanism
• Work out the usage of contextualised translations. "Liberation Day" may not be translated alike for a country or another, even if they're labelled the same.
• Generate .po files for a variants (or French/France only?)
• Add a "how to use the translated labels" in the docs
• Add a "how to help for translation section"

[ewjoachim]

Wouldn't it be worth adding the country (or group) as translation context ? Maybe "Labour day" would be called differently in a language depending on if it's the country's Labour day or another labour day ?

[brunobord]

@ewjoachim that's in the checklist below the BIG COUNTRY list already.

[brunobord]

it became way too big, now. Each contribution is introducing a conflict. Or we miss the translations, etc. I think we'll have to rethink the strategy here... :/

[claudep]

What about committing the infrastructure part with maybe the core translations? Then the rest of the work can be done step by step later.