Hi,
The domain could be used, but not as a registrar for the domain business, which would be a salient trademark infringement against register.com.
But it could be used as a portal to all types of âregisterâ sites, including domain registration, car registration, boat registration, business registration, etc., and there would not be trademark issues.
Or it could be used as a âregisterâ site exclusively for one non-domain related thing, such as wedding registrations.
But in terms of value, the .tl (Timor-Leste) extension is rather weak, and thus the concern about trademark issues quickly becomes moot when the extension is focused on.
Mid $xx
Good luck