SAP is available in Chinese, but the international version is in English. If you want to be an SAP consultant, you must understand the design concept of SAP and have the basic knowledge and process knowledge of each module operation.
If you make a mistake, you can't do without SAP experience. However, SAP has low requirements for English. If you can easily handle all English work from production and procurement to sales and service, then using SAP should not be a problem.