I feel like DS still does not pronounce a lot of his words correctly and no one other than DH and I ever understands what he's saying. He doesn't seem to be able to pronounce his "L's" (he pronouces them with a Y sound), "R's (pronounces them with a W sound)" and a lot of the combo consonant sounds like "tr", "cr", etc.(he'll skip the second consonant).
Usually, when he learns a new word, he'll try to repeat it, but it sounds nothing like the original word. the syllables are usually said in the wrong order.
Re: Is this typical for a 2.5 year old's speech?
Jen - Mom to Jillian (10/2008) and Hayden (4/2010)
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it was normal for us.
DS is 3.5 now and still says the w sound for r's.
People are telling me now that his speech is much better and it is. Give it time.
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DD1 is 3.5 and still doesn't pronounce everything clearly. Off the top of my head, I know she has trouble with Ks, Ls, Rs, and Ts, and there may be more. I probably should pay more attention to it, but I guess I take it for granted how well I can understand her since I'm with her all the time.
I remember a year or two ago, someone here posted a breakdown of how well you should be able to understand your kids at various ages, like x% at 1 year, x% at 18 months, and so on. I just wish I had copied it down then!
Anyway, I did find this online:
General Guideline for Sound Production
3-4 years: p, b, m, w, h and all vowels
5-6 years: d, t, n, g, k, f, y, ng
7-8 years: r, l, s, ch, sh, z, j, v, th, sh
https://www.earlyinterventionsupport.com/development/speech/articulation.aspx
This is similar at our house too. I feel bad when I really have no idea what he is saying!
I ask him to say it over and over and he look at me like I am nuts. 
What you are describing is perfectly developmentally appropriate and even expected.
Here are a couple of things to look at:
https://www.talkingchild.com/speechchart.html
https://www.speech-language-therapy.com/Table4.htm
https://www.speech-language-therapy.com/intelligibility.htm
https://www.speech-therapy-information-and-resources.com/phonological-processes.html
The third is what a previous poster is/was referring to.