@chachachawaAah so it's just like saying "liiitle", I knew I've already heard this somewhere, thank you!こ
32 サムライハート(Some Like It Hot!!) (Live - JUST LIKE THIS 2015) VIP SPYAIR 轍～Wadachi～ 04:14 33 Somebody (Trying To Tell You Something) Tanya Tucker Dreamlovers 03:35 34 Something VIP Henry Green Shift 03:22 35 Don’t Wake Me Up VIP MC MONG,SOYOU X by X [ Dream ...
You can get by in a language without slang, but it definitely helps knowing them if you're speaking informally with friends. Slang will come up in movies as well. I wouldn't say slang adds anything to a language, except maybe a bit of color like you said. Different people will use di...