Emergency fix for the blank nan bug and zh check bug in batch mode

Fixed an issue where the language set in the tasks settings of version 1.5 was ineffective.

Added mirror source selection for installation steps

紧急修复了 batch 模式的留空 nan bug和 zh 检查 bug，

修复了1.5版本tasks setting中设置的语言无效的问题

增加了安装步骤的镜像源选择