protected function prepareForValidation(): void 	{ 		$this->merge([ 			'slug_en' => $this->slug_en ? Str::slug($this->slug_en) : null, 			'slug_hr' => $this->slug_hr ? Str::slug($this->slug_hr) : null, 			'slug_bs' => $this->slug_bs ? Str::slug($this->slug_bs) : null, 			'slug_mk' => $this->slug_mk ? Str::slug($this->slug_mk) : null, 			'slug_sl' => $this->slug_sl ? Str::slug($this->slug_sl) : null, 			'slug_sr' => $this->slug_sr ? Str::slug($this->slug_sr) : null, 			'slug_fr' => $this->slug_fr ? Str::slug($this->slug_fr) : null, 			'slug_de' => $this->slug_de ? Str::slug($this->slug_de) : null, 		]); 	}