Add service for translate documentation

[olegatro]

Hi, can you add crowdin or other service for allow translate documentation.

[garemoko]

crowdin looks like something that could be useful for large translation projects involving many people. Right now, having too many people translating the spec is not a problem we have.

If you'd like to translate it, I suggest create a fork and then create translated copies of the documents in a folder.

[olegatro]

Thank you.