Disclaimer: This is a highly opinionated project and set of files and conventions. If you don’t like any of those: feel free to change them for your project or fork the hell out of this repository. Be sure to update documentation if you do so.
Documentation should be written in English, since it is the most accessible language for developers worldwide, even if the page/content itself is in other languages. Try to use simple language and provide examples wherever applicable.
If your editor of choice supports editorconfig, you should already be fine, this project provides an .editorconfig-file that sets all conventions. If not: 2 Spaces for everything, UTF-8 everything, Unix-Style linebreaks, no trailing spaces except for Markdown and text-files.
The JavaScript-, HTML- and Sass-linters will be enabled by default with the settings from above, so if you try to move away from those conventions: you will be warned :) The linters will try to enforce a specific coding style regarding whitespace, naming stuff, usage of variables etc. to make your code consistent, so please try to stick to it. You can always customize the linters: read more about that here.
Files should always be in lowercase, use dashes where applicable. No underscores, unless you want to exclude files from the styleguide, see Naming and referencing in Fractal.
For more details on language-specific coding conventions or coding styles, have a look here: