Support the official languages of the European Union

[jaller94]

As an extension of the general translation ticket #1, we want to lay an extra focus on the official languages of the European Union.

• [ ] Bulgarian
• [x] Croatian #159
• [ ] Czech
• [x] Danish
• [x] Dutch
• [x] English
• [ ] Estonian
• [x] Finnish
• [x] French
• [x] German
• [x] Greek
• [x] Hungarian
• [ ] Irish
• [x] Italian
• [ ] Latvian
• [ ] Lithuanian
• [ ] Maltese
• [x] Polish
• [x] Portuguese
• [x] Romanian
• [ ] Slovak
• [ ] Slovenian
• [x] Spanish
• [x] Swedish

[ExtSol]

The link to the Romanian language file is wrong. The correct link is: https://github.com/KIProtect/klaro/blob/master/src/translations/ro.yml

Note: ISO 3166-1 Alpha-2 code for Romania is RO.

[saitho]

From the list above PT, PL and DA are already available.