Question: Ramakrishna Pillai, (1878–1916) was a nationalist writer, journalist, editor, and political activist, Karl Marx (1912) are among his most noted works in Malayalam, the first ever biography of Karl Marx in any Indian language, which languages spoken in India belong to several language families, the major ones being the Indo-Aryan languages spoken by 75% of Indians and the Dravidian languages spoken by what percentage, of Indians?

Context paragraphs:
Languages of Scotland: The languages of Scotland are the languages spoken or once spoken in Scotland.  Each of the numerous languages spoken in Scotland during its recorded linguistic history falls into either the Germanic or Celtic language families.  The classification of the Pictish language was once controversial, but it is now generally considered a Celtic language.  Today, the main language spoken in Scotland is English, while Scots and Scottish Gaelic are minority languages.  The dialect of English spoken in Scotland is referred to as Scottish English.

List of English words of Dravidian origin: This is a list of English words that are borrowed directly or ultimately from Dravidian languages.  Dravidian languages include Kannada, Malayalam, Tamil, Telugu, and a number of other languages spoken mainly in South Asia.  The list is by no means exhaustive.

Languages of India: Languages spoken in India belong to several language families, the major ones being the Indo-Aryan languages spoken by 75% of Indians and the Dravidian languages spoken by 20% of Indians.  Other languages belong to the Austroasiatic, Sino-Tibetan, Tai-Kadai, and a few other minor language families and isolates.  India (780) has the world's second highest number of languages, after Papua New Guinea (839).

Languages of Asia: There is a wide variety of languages spoken throughout Asia, comprising different language families and some unrelated isolates.  The major language families spoken on the continent include Altaic, Austroasiatic, Austronesian, Caucasian, Dravidian, Indo-European, Siberian, Sino-Tibetan and Tai-Kadai.  They usually have a long tradition of writing, but not always.

Linguistic history of the Indian subcontinent: The languages of the Indian subcontinent are divided into various language families, of which the Indo-Iranian and the Dravidian languages are the most widely spoken.  There are also many languages belonging to unrelated language families such as Sino-Tibetan, spoken by smaller groups.  Linguistic records begin with the appearance of the Brāhmī script from about the 3rd century BCE.

Nostratic languages: Nostratic is a macrofamily, or hypothetical large-scale language family, which includes many of the indigenous language families of Eurasia, although its exact composition and structure vary among proponents.  It typically comprises the Indo-European, Uralic, Altaic and Kartvelian languages, as well as the Afroasiatic languages spoken in North Africa, the Horn of Africa, the Arabian Peninsula and the Near East, and the Dravidian languages of the Indian Subcontinent (sometimes also Elamo-Dravidian, which connects India and the Iranian Plateau).

Swadeshabhimani Ramakrishna Pillai: K. Ramakrishna Pillai (1878–1916) was a nationalist writer, journalist, editor, and political activist.  He edited "Swadeshabhimani" (The Patriot), the newspaper which became a potent weapon against the rule of the British and the erstwhile princely state of Travancore (Kerala, India) and a tool for social transformation.  His criticism of the Diwan of Travancore, P. Rajagopalachari and the Maharajah led to the eventual confiscation of the newspaper.  Ramakrishna Pillai was arrested and exiled from Travancore in 1910.  Vrithantha Pathra Pravarthanam (1912) and Karl Marx (1912) are among his most noted works in Malayalam, Vrithantha Pathra pravarthanam being the first book on journalism in Malayalam and Karl Marx, the first ever biography of Karl Marx in any Indian language.

Bible translations into the languages of India: Languages spoken in India belong to several language families, the major ones being the Indo-Aryan languages spoken by 75% of Indians and the Dravidian languages spoken by 20% of Indians.  Other languages belong to the Austroasiatic, Sino-Tibetan, Tai-Kadai, and a few other minor language families and isolates.  India (780) has the world's second highest number of languages, after Papua New Guinea (839).

Tatsama: Tatsama (Sanskrit; ] ) are Sanskrit loanwords in modern Indo-Aryan languages like Bengali, Marathi, Oriya, Hindi, Gujarati, Sinhala and Dravidian languages like Malayalam, Kannada, Telugu, and Tamil.  They belong to a higher and more erudite register than common words, many of which are (in modern Indo-Aryan languages) directly inherited from Old Indo-Aryan (tadbhava).  The tatsama register can be compared to the use of words of Greek origin in English (e.g. "hubris").

Borean languages: Borean (also Boreal or Boralean) is a hypothetical linguistic macrofamily that encompasses almost all language families worldwide except those native to sub-Saharan Africa, New Guinea, Australia, and the Andaman Islands.  Its supporters propose that the various languages spoken in Eurasia and adjacent regions have a genealogical relationship, and ultimately descend from languages spoken during the Upper Paleolithic in the millennia following the Last Glacial Maximum.  The name "Borean" is based on the Greek βορέας, and means "northern".  This reflects the fact that the group is held to include most language families native to the northern hemisphere.  Two distinct models of Borean exist: that of Harold C. Fleming and that of Sergei Starostin.

Supporting paragraphs: Swadeshabhimani Ramakrishna Pillai Languages of India
Answer: 20%