Does OS Language Packs required before installing the SharePoint Language Packs

I am kind of confuse about this and could not find any anwser so far.

Are OS languages Pack required before installing the SharePoint Language Pack?

I tired to install Sharepoint LPs without OS language packs and its worked without any issue but i dont know if there is any dependency ,which i dont know , on the OS LPs. I dont know Spanish so cant test it. Your help always appreciated.If anything from MSFT article will fix my brain.

thanks

-wS

Thanks -WS SharePoint administrator, MCITP(SharePoint 2010)