How did the spanish language change over time

As Spain began to colonize more and more countries those countries began to develop slang which then resulted in the slang being an everyday thing so then it became part of the language so thats why every spanish speaking country speaks differently.

Can you give me the link also to the question

Conocer is the one you’re looking for. saber is to know a fact, conocer is to know something/ someone. hope i’m on time. : )