The Taiwanese N64 controller is identical to the Japanese controller. However, the box was localized for the Taiwanese region and features Traditional Chinese translations of all text.
The term 操作器 was used for ‘controller’ which translates as ‘operating/manipulating device’. Nowadays 搖桿 ‘joystick’ is more common, or 手把 which actually means ‘handle’ but has come to be used for game controllers.
As part of the localization Nintendo also chose to translate the “Bros.” branding that was applied to certain official products in Japan. Though, instead of properly localizing it to 兄弟 ‘brothers’, they transliterated it to 普羅斯. Which doesn’t mean anything in Chinese.
@CdMega confirmed this when I posted some box scans and thoughts about the 普羅斯 usage:
Chinese person here, I can confirm your theory. 普羅斯 is a direct transliteration (typical Taiwanese, huh?) from ブロス a.k.a. Bros.
At the time, Nintendo used the 'Bros.' branding for different colour variations, so it's the same thing as the Game Boy Bros. From 1995.
— Chinese New Year with Mega-CD (@CdMega) January 11, 2019
As you can see on the instruction sheet 普羅斯 is actually in quotes, which makes more sense, though they still should’ve just omitted it.
The model number for the controller is NUS-005. The instruction sheet also shows a box code of NUS-A-CG-ROC. ROC standing for Republic of China, or Taiwan. On a photo further down that shows the box flap, the code is actually written NUS-A-CY-1-ROC. Due to the discrepancy between code numbers it’s possible that these instructions are not for this controller, since CG probably stands for Controller-Gray, while CY stands for Controller-Yellow. It’s also possible that Nintendo in Taiwan used the same instruction sheet for all controllers, regardless of controller color.
Here are photos of the rest of the box and controller:
In the last photo you can see that oils have started to come out of the cable. This, along with the damage to the instructions, is probably a result of the humid weather in Taiwan.
If scans are more your thing, then here are the box scans: