Artists paint in front of the language martyrs' memorial monument in Dhaka, Bangladesh, on Feb. 19, 2020. Bangladesh is preparing to celebrate the International Mother Language Day which falls on Feb. 21. The United Nations Educational, Scientific and Cultural Organization (UNESCO) declared Feb. 21 as the International Mother Language Day. (Str/Xinhua)

Artists paint in front of the language martyrs' memorial monument in Dhaka, Bangladesh, on Feb. 19, 2020. Bangladesh is preparing to celebrate the International Mother Language Day which falls on Feb. 21. The United Nations Educational, Scientific and Cultural Organization (UNESCO) declared Feb. 21 as the International Mother Language Day. (Str/Xinhua)

An artist paints on a wall beside the language martyrs' memorial monument in Dhaka, Bangladesh, on Feb. 19, 2020. Bangladesh is preparing to celebrate the International Mother Language Day which falls on Feb. 21. The United Nations Educational, Scientific and Cultural Organization (UNESCO) declared Feb. 21 as the International Mother Language Day. (Str/Xinhua)

Artists paint in front of the language martyrs' memorial monument in Dhaka, Bangladesh, on Feb. 19, 2020. Bangladesh is preparing to celebrate the International Mother Language Day which falls on Feb. 21. The United Nations Educational, Scientific and Cultural Organization (UNESCO) declared Feb. 21 as the International Mother Language Day. (Str/Xinhua)