Style checking
One of the features most missed by writers working in docs-as-code is a good spelling, grammar and style checker. By default, spell-checking is provided by your web browser or integrated development environment. This may be adequate for simple websites, but if you need something more advanced then you need a dedicated grammar checker.
LanguageTool
DocStatic is tested with LanguageTool, an AI-based grammar checker that supports over 20 languages. It's free to register for the basic plan. The premium plan adds style-guide support for individuals and teams. Tailored businesses plans are available. There is also a discount for students and non-profits.
Self hosted
Because LanguageTool is open-source, you have the option of self-hosting. In this case there are no subscription fees, but you will need a development team to set up your LanguageTool instance, and you'll have to provide your own support.