the language I have in my map is Russian, English, french, Spanish, Portuguese, Chinese, Hindi and Arabic
Russian didn't spread anywhere and stay in the country. But Russia is already bigger than most country so even though it didn't spread, it is already big.
English spread all over the world but didn't spread a lot in a part of the world. In America, it spread to northern America and some parts of Africa, mostly the south Africa part, Nigeria, Kenya, Uganda, Liberia, and ghana.
French spread a lot also, mostly in Africa. The middle parts of Africa such as Zambia, Botswana, republic of congo, central African republic and the west part like niger, mali, Togo, Burkina Faso, and Benin.
Spanish, even though the country it is small, it spread a lot bigger than it own country to the west part of south America. Countries near the Andes Mountain such as Chili, Peru, Argentina, Bolivia, and Colombia.
Portuguese also is a very small country but was able to spread to around half of south America to countries like Brazil, Venezuela, Guyana, Uruguay, and Suriname.
Chinese, Hindi and Arabic are three other languages, like Russia, that didn't spread anywhere. But also like Russia, the countries themselves is already big compared to another country, so even though it didn't spread, it still is used in quite a lot of lands.
I can conclude that without the age of exploration, the world wouldn't still be able to communicate and each would be alone and there would be thousands of small languages.