- $field_name = Unicode::strtolower($this->randomMachineName());
- $field_label = Unicode::ucfirst(Unicode::strtolower($this->randomMachineName()));
+ $field_name = mb_strtolower($this->randomMachineName());
+ $field_label = Unicode::ucfirst(mb_strtolower($this->randomMachineName()));