KiCad is composed of a few separate parts that come together as the application. Each part resides in what is known as a repository and you must identify the correct one to post a issue to.
However, before reporting a issue in any repository:
Please make best effort to locate any existing issue that may be a duplicate of your problem before starting a new issue.
On the New Issue page if you see a prefilled description like this example:
Please do your absolute best to fill in the issue per contents of the description and respond to any additional requests for information. It helps both you and developers to resolve issues.
If you have a functional issue with using any application be it the project launcher (KiCad), schematic editor (Eeschema), pcb editor (Pcbnew), Gerber viewer (gerbview) and other executables.
The correct issue repository is located here
KiCad applications by default have all of their interface text written in English. A group of contributors creates special translation files to convert the English text to other languages.
If there is any issue with a translation or even a missing translation, please report is here
All the documentation is made up a team of contributors that spend their time painstakingly keeping content up to date with KiCad’s changes. Additionally contributors also spend time translating the same manuals into other languages.
If there are issues with any content in a manual in any language including English, please report it here
Issue trackers are not for general support requests relating to how do you use or do something in KiCad.
You should instead look at the community forums links for communities that can provide help.