The built in dictionaries of macOS and iOS

Did you know that your Mac, iPhone and iPad comes with high quality foreign language dictionaries for many languages?

I don't mean machine learning translation, I mean real dictionaries like Oxford, Duden, Pons, etc.

For example there are Dictionaries for German, English, Mandarin, French, Italian, Korean, Thai, Turkish, Tamil and more.
Even dual-language dictionaries for combinations like French-English, German-English, Korean-English, and others.
As well as an English Thesaurus, which is super useful for copy writing.

I have written a short blog post about how to activate and use the dictionaries on iOS and macOS.