The Dravidian and other (Harappan, Tebetan, Elamite, Sumerian, Ancient Egyptian, Swahili, Dogon, Bangime, Hausa, Yoruba, Mayan, Easter island (Rongorongo), Maori, Polynesian, Malay, Vietnamese, Thai, Japanese, Ainu, Chinese, Korean, Manchu-Tungus, Mongokic, Turkic, Gerogian, Lycian, Lydian, Ugro-Finnic, Basque) languages in the light of heuristics and cryptology : a research report