Add translations

[Ruben2776]

If you would like to translate PicView, it can be done in two ways. Please have a look at my guide:

Using Crowdin

1. Go to https://crwd.in/picview
2. Choose desired language to translate. Note Enter, Delete, Shift, and alt are keyboard key names.
3. Send me a message when you're done and I'll add it manually

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Manual way

1. Fork the repo and create your branch from dev.
2. Copy en.xaml from /PicView/Translations and rename it to your two letter language code (wiki).
3. Edit the string values of the xx.xaml file to your language.
4. Issue a pull request.

If you want to test it
not required

1. Open the project with the latest version of Visual Studio and have the latest .NET SDK installed.
2. Add the two letter language code to the enum /PicView/Translations/Languages.cs.
3. Add language to /PicView/Translations/LoadLanguage.cs (copy-paste one of the others, add your own).
4. Start the app and change the language in the settings window F4.

[Crystal-RainSlide]

For xx-xx / xx_xx (zh-CN / zh_CN for example), should we use - or _?

[Ruben2776]

It should be zh_CN then :)