Is the long-standing Chinglish acceptable?

Long time no see is not Chinglish, and it has been used in the United States for more than a hundred years.

It is humor to break the ice. A funny sorta greeting. Now accepted.

http://en.wikipedia.org/wiki/Long_time_no_see_(phrase)

Yes, and note that the Wikipedia article suggests that its use in the American language comes from contact with aboriginal Americans.

'Ho noi mo kin' in Cantonese is "long time, not meet"

'Long time no see' is "pidgin english" which has several dialects. I am fluent in the Pacific version. That phrase comes from the North American version. Its equivalent in the Pacific ver is "long time no lukim yu". Chinglish refers to the attempts by Chinese companies to go cheap on a translator and use some office worker who convinced the boss he can speak english. To a fluent english speaker these are either totally unintelligble or hilarious. Following is one I found in a model kit :

Produce at the same time in the M1941 KV-1 type, the KV-2( Also be called the year in M1941 KV-2 type) also threw in the production. The KV-2 characteristic is its quick-fried tower shape. The quick-fried tower that equip 152 millimeters of howitzers reports the hexagon keeps the square form, resembling an enormous box. But, it is said because of the excess, if not on the horizontal plane, dry by heat the tower connect to revolve all and very difficult. Because of such weakness, KV-2 is in actual battle, only used for proceeding to the virtuous soldier the thermodynamic power inhibit, but need not in the battlefield that hour of backstroke break war.

Are there any questions ?

No tickee, no laundry

Note too that the Wikipedia article also suggests that the phrase may have originated from Chinese Pidgin English.

I noted that, but American contact with aboriginal Americans was far earlier and far more extensive. You don't convince me that it can reasonably be taken to be "Chinglish."

This phrase (long time, no see) was how I greeted family from my crib, as a toddler. Similar to this thread, some family members thought I was speaking pidgin English; others thought I was speaking something from an old British movie that took place in one of its Empire's colonies. Regardless, I do not use this phrase anymore. A simple "Hi" now suffices for all the contact I want.

I think you are mixing Chinglish with pidgin English. Chinglish would have Chinese words mixed in with English like the way Indians use English: "Aray(okay) Bhai (brother or friend), go now" That is Indian English. Ho = very; noi=time; mo=no or not; kin=meet or see. 'Long time, no see' is a transliteration of proper Cantonese greeting.

If that is true, it is a coincidence.Refer to a pidgin english dictionary circa 1600. The expression was used in the Americas and India long before extended contact with the Chinese.

There were/are many Chinese in India and many British folks went to Chinese restaurants.

?????Pidgin English started as soon as the English contacted the New World. Were there many Chinese restaurants in London then ? As for the Chinese in India, that was 200 yrs later in British India.