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Vocalization is the phonetic process which core is substitution of a consonant with a vowel sound having similar articulation basis.

I'm sure you also vocalize [l] in the word 'milk', so it sounds...

Laxxy, maybe you try to vocalize your [l] and thinks it's kind of [w] sound? There is a tendency in the English phonetics, I must admit.

'Is is' - rarely do I see this one being repeated!

You mean it?
Maybe you want to say "sob"? Sod is a way different.

They sound differently but overall the idea implied in them is the same.

English names are often mispronounced and you you'll know so many variants of one and only name which the owner of tis name wouldn't hear in all his/her life. :(