Solved. Needed to install windows 10 home single language

I mean regarding the windows 10 home single language, which is the original os of my laptop. Will differences in language will cause the SL OEM key to be rejected?

He was right. This is what happened.

Another question, would the language matter? What if the language of the initial windows 10 is different from I will install? Will it result to errors?

Okay. The OEM edition is Win 10 RTM CoreSingleLanguage OEM: DM according to ShowKeyPlus. Should I install the Win 10 home single language?

No, it is not a system builder. Its DM version

So, my friend recently bought a laptop and ****ed it up. Initially, its OS was Windows 10. But then, I corrupted its OS so I tried to fix it using a recovery media created using a working windows 10...