"European", not "European continent".
The latter one isn't even a propper adjective so it is gramatically impossible to use it in cases where you need an adjective.
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I know, but times change...
That is why I prefer the German way of making compounds, it is easier to distinguish between a "continental breakfast" and a breakfast that is continental. (Yes, I know German uses both kinds of compounds just like English does, but which way is more common is reversed.)