Yes, provided the speaker and the listener understand each other explicitely, that's all any spoken language requires. The written word is different.
It's interesting that while the BBC for example, allows its broadcasters to switch the subjective 'I' and objective 'me' with impunity, it's written English is superb. I think those of us with a 'traditional' English education accept most bastardisations of the spoken word as normal and acceptable, but one or two do tend to gripe, with me anyway.
My personal pet hate is, I'm afraid, an Americanism. As noted above, the use of 'than' instead of 'from' is quite appalling. How something can be 'different than' something else suggests a complete ignorance of the basic tongue. I have never, ever, heard the term 'different from' spoken by an American. I guess it is down to education. So do American schools teach 'English' or American English'?
JaX