You would probably not think much of dings and dongs except in the context of bells (and American slang). However, the disambiguation feature of Wikipedia tells us about several other dings and dongs:
There are a couple of examples from India which Wikipedia did not catch-such as the small railway station of Ding in Haryana:
It is served by a number of trains (mainly slow passenger trains) between Hisar and Bathinda.
You may also have heard of Ding as a derogatory term for Anglo-Indians. The internet has an explanation for this, apparently from a blogger from Tamil Nadu:
Not sure if that was to be taken seriously. However there is a traditional Anglo-Indian dish called ding ding, which is called jerky in other countries:
The dong has many more meanings including names and places, and even a large company based in Scandinavia:
Dong is a common name in China and Vietnam, where Pham van Dong was one of the architects of their victory over the US: https://en.wikipedia.org/wiki/Ph%E1%BA%A1m_V%C4%83n_%C4%90%E1%BB%93ng
Then there is the Vietnamese dong, which until recently was the least valuable world currency unit. More recently the thinly traded Iranian rial has taken this position.
At the moment the US dollar will get you over 22,400 VND (Vietnamese dong). while the Indian rupee will get you over 330. Even the Indonesian rupiah will get you 1.6 VND. The most valuable currency unit is the Kuwaiti dinar, which will get you 3.29 US dollars, 221 Indian rupees or…73,800 Vietnamese dong.
And Dong is the easternmost village in India. Its population fits into three huts. You still have to travel about 20 km further east to reach the tri-junction of India, China and Myanmar.
This map shows its location more clearly:
There is no railway line anywhere in that area, though there are stations such as Dongargaon and Dongargarh:
This station used to have a large steam shed earlier. It lies in Chhattisgarh on the main line from Mumbai to Kolkata.
Then there is the more common American usage for the dong, which needs no explanation.