Asus China version has both Chinese and English UI.
https://forums.hardwarezone.com.sg/...-tuf-ax5400-rt-ax5400-and-tuf-ax4200.6315347/
2. Note: Asus China version vs Local version
They are basically the same HW and same FW, just different country code. The country code can not be changed as it is outside of the FW area. The country code will decide the minor differences in the behaviours.
Major difference:
Local version has three years HW warranty. China version will have no local warranty.
Minor differences in terms of FW behaviours:
1) China version has Chinese/English Web UI
2) China version may have specific game accelerator (网易 UU 加速器), just ignore it.
3) China version may ping Baidu for web monitoring but you can change the behavior.
4) Some China version routers may have special Web UI skins like Asus TX-AX6000, which is a bit different from local version TUF-AX6000.
5) China version has wireless region default to China, but you can usually change to Asia region to be compliant to local regulation.
6) Some reports say that Asus Instant Guard VPN may not work with Asus China routers.