The most common hole in a global trademark portfolio, because Taiwan cannot be reached through the route most companies use for everywhere else.
Taiwan sits outside both PCT and Hague. Every patent and every design must be filed nationally, and the Paris Convention priority year is the only window you get. This is the jurisdiction most often missed entirely.
There is no international-registration shortcut. A national filing is the only route in, which is exactly why so many portfolios show a gap here.
Taiwan keeps its own register. Treat it as a separate market decision, not an extension of a China filing.
Same logic as the mainland: register the characters your customers will actually use.
One of the faster registers in the region, which makes an early filing cheap insurance.