If you are referring to number of native speakers, it's Hindi-Urdu.
By native speakers, the fourth most spoken language is Hindi. By total speakers, again, the fourth most spoken language is Hindi.
The 4th most spoken language in the world is Hindi, predominantly spoken in India and by the Indian diaspora around the world.
The 4th most common language spoken in the US is Tagalog, which is spoken by a large population of Filipino Americans.
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by popular do you mean most widley spoken?
English is the most popular language spoken in Australia, but it is not the official language, as Australia has no declared official language.
English is the most popular language spoken in Australia, but it is not the official language, as Australia has no declared official language.
One of the most popular...
Perl is the most popular language used for CGI programs.
The C++ Programming Language by Bjarne Stroustrup (creator of C++), now in its 4th Edition.
The most popular English-language search engines in China are Google and Bing.
By native speakers, the fourth most spoken language is Hindi. By total speakers, again, the fourth most spoken language is Hindi.
Mandarin
english
english
slang
The 4th most spoken language in the world is Hindi, predominantly spoken in India and by the Indian diaspora around the world.