Welcome to the community!
Fido does have Chinese speaking customer service representatives. However, those calls are not from Fido. They are from spammers/scammers trying to target Fido's Chinese immigrant customer base. I understand many people who do not speak or understand the language are also receiving the calls. It's easier for the spammers/scammers to simply call all of Fido's phone numbers rather than to determine which phone numbers belong to Chinese customers. In fact, it appears that they aren't even bothering to only target Fido customers anymore. Some people from other providers have also received similar messages.
Unfortunately, since the spammers/scammers use spoofed numbers, there isn't much that can be done to prevent the nuisance calls. While Universal Call Block has been implemented, that system only blocks calls from malformed phone numbers. Hopefully, the new protocol STIR/SHAKEN will help prevent nuisance calls from spoofed numbers. However, that system is not yet fully implemented.
Hope this helps 😀