In Dutch (both in .nl and .be), the English term 'master bedroom' was fashionable for a few years, until the stigma of that term carried over from the Anglosphere and it's now being replaced (in the woke areas of the country) with 'ouderslaapkamer', which is literally translated 'parent bedroom'. Although now that term itself is 'controversial' (not mainstream controversial, more in small hardcore circles, so I'm not sure if this will actually become an issue) because (to the best of my understanding of this objection) 'parent bedroom' implies that the 2-parents-with-children family form is normative (you can't make this up if you tried to), which it shouldn't be.
Not sure what my point is, maybe that using 'master' for 'main' is no longer outright commonly accepted usage?