1. It can be disassembled and used, but it cannot be marked R. It is just another unregistered trademark of yours.

2. You can apply for registration of Chinese characters and English as two new trademarks. In the end, you have 3 registration certificates, which are equivalent to 3 registered trademarks. You can use them individually, in combination, or in combination with all 3, because there is no law that stipulates that only one trademark can be used on a product.

3. If you consider the future use before registration, you only need to register English and Chinese characters as two trademarks respectively, which can be used separately or in combination. Finally, put an R in the upper right corner of each mark.