Words like lakh and crore derive from Sanskrit - hence these words are prevalent not only in India but also in other countries in the south-east Asia like Bangl

Words like lakh and crore derive from Sanskrit - hence these words are prevalent not only in India but also in other countries in the south-east Asia like Bangladesh, Pakistan and Nepal. Western units are used wherever applicable - i.e. to denote 1,000 the word "thousand" is used and not "hazaar". Unfortunately, western units are deficient in that there are no units to denote a hundred thousands (lakh - 100,000) or ten millions (crore = 10,000,000). Likewise, there are no western units for 10,000 - so you have to use the Japanese word 'maan'.