I, you, me, they etc (always so short words?)

Actually Italian personal pronouns are:
io = I
tu = you
egli, ella, lui, lei, esso, essa = he, she, it
noi = we
voi = you
essi, esse, loro = they

Chinese- Spoken Cantonese:
O (I)
Lei (you)
Kui (he/she)
O dei (we)
Lei dei (you, plural)
Kui dei (they)


>> I'm really ashamed of fellows of my own people for speaking this language so natively bad that foreigners often don't even know the proper, conventional and true pronunciation of even words like pronouns.

It should be

Ngo (here, the /ng/ is often omitted, which is substandard)
Nei (here, people can't distinguish between lateral /l/ and nasal /n/, see below also)
Kui
Ngo dei
Nei dei
Kui dei

I must say that I've really met Cantonese-speaking university students who spoke Cantonese that was only 80% intelligible. They tend to ellipse vowels and don't pay attention to lip shapes, to the extent that they are simply murmuring their native language as if they were learning that for the first time. Personally, I think our current trends are unacceptable because a choppy language of such kind shouldn't have lots of elisions like Mandarin's (where they are very naturally applied).

Chinese- Spoken Cantonese:
O (I)
Lei (you)
Kui (he/she)
O dei (we)
Lei dei (you, plural)
Kui dei (they)


The peoples of Cantonese communities is talking in the native Spoken Cantonese every day which is their Spoken Language. But when they are educated in the schools that will only teach them with the Mandarin Writing, in which the words of Mandarin Writing are pronounced in Cantonese sound. That is the Written Language of Cantonese people. The Cantonese, Shanghainese and Mandarin are the sister languages of Chinese Language Group.

Chinese- Spoken Cantonese (Spoken Language):
O (I)
Lei (you)
Kui (he/she)
O dei (we)
Lei dei (you, plural)
Kui dei (they)

Chinese- Mandarin Writing which words reading in Cantonese pronunciation (Written Language of the Cantonese people):
O (I)
Lei (you)
ta (he/she)
O mun (we)
Lei mun (you, plural)
ta mun (they)

The Shanghainese people is talking in native Spoken Shanghainese which is their Spoken Language. And they are only educated in schools in the Mandarin Writing with Mandarin sound which is their Written Language.

Chinese- Spoken Shanghainese (Spoken Language):
Ngu (I)
Nong (you)
I (he/she)
Alla (we)
Na (you, plural)
Illa (they)

Chinese- Mandarin Writing (Written Language of the Shanghainese people):
Wo (I)
Ni, nin (you)
Ta (he/she)
Wo men (we)
Ni men (you, plural)
Ta men (they)

The Mandarin people is talking in native Spoken Mandarin which is their Spoken Language. And they are only educated in schools in the Mandarin Writing with Mandarin sound which is their Written Language.

Chinese- Spoken Mandarin (Spoken Language):
Wo (I)
Ni, nin (you)
Ta (he/she)
Wo men (we)
Ni men (you, plural)
Ta men (they)

Chinese- Mandarin Writing (Written Language of the Mandarin people):
Wo (I)
Ni, nin (you)
Ta (he/she)
Wo men (we)
Ni men (you, plural)
Ta men (they)


The Sister Languages of the Chinese Language Group in wikipedia.
wikipedia of classical writing and literary writing
http://zh-classical.wikipedia.org/wiki/%E5%8D%B7%E9%A6%96
wikipedia of cantonese writing
http://zh-yue.wikipedia.org/wiki/%E9%A0%AD%E7%89%88
wikipedia of shanghainese writing
http://wuu.wikipedia.org/wiki/%E5%B0%81%E9%9D%A2
wikipedia of mandarin writing
http://zh.wikipedia.org/w/index.php?title=%E9%A6%96%E9%A1%B5&variant=zh-sg

in Lusian personal pronouns are quite long:

I = ugguarianniuruisssiu
You= poshuiunnarissa
she
he = protteryujvvu
it
we = annuttureni
you= mattaluneidi
they = poiuyttannarussantimanti