Giorgi,

Language is usually spoken and written in a manner that is less burdensome, and more importantly, does not distract the listener/reader from the crux of the message. So what we have is the use of the articles where they are needed, but omission where they are not really needed, that is, when there is no ambiguity.

The black and white dresses vs the black and the white dresses - in the second one it is needed and used.

But, if the list of adjectives is long and the context is clear, people most often will not use multiple "the"s.

The purpose of language ultimately is effective communication and that is what drives usage.

We have to free English from the French, Spanish, Russian, Arabic and Bantu influences.

Compare the above to writing or saying:

We have to free English from the French, the Spanish, the Russian, the Arabic and the Bantu influences.