Many many countries speak the same language. Here are just a few examples:
The following 4 continents have countries that speak Spanish as an official language:AfricaEuropeNorth AmericaSouth America
Almost every countries in the world speak two language , one is their mother language and another is English (The international Language)
Everyone, because that is the same language,it has different name because it is spoken in different two countries
France and Belgium although Belgium has a significent Dutch speaking population. Switzerland speaks French, Italian and German Austria and Germany both speak German Romania and Moldova both speak Romanian. England, Scotland and Ireland speak English predominately. Serbia, Montenegro, Croatia, Bosnia and Herzegovina speak same language, formerly known as Serbo-Croatian.
The two countries in the Lesser Antilles that speak French are Martinique and Guadeloupe. They are overseas departments of France, and French is the official language in both territories.
Greece and Cyprus are the two European countries where Greek is the native language of the majority of the population.
Here is a list of South American countries that do not have Spanish as an official language. Some of these countries speak spanish as a common language though, even though it's not official:ArgentinaBrazilChileFalkland IslandsFrench GuianaGuyanaNicaraguaSurinameUruguay
Some potential barriers to communication between two people who speak the same language include differences in communication styles, misunderstandings due to assumptions or biases, lack of active listening, and distractions. Additionally, poor body language or nonverbal cues can also impede effective communication between individuals who speak the same language.
Swahili is spoken as a significant language in several countries in East Africa, but the two countries where it is predominantly spoken are Tanzania and Kenya. Swahili is the official language in Tanzania and one of the official languages in Kenya.
Spanish - because most of the South American countries speak that language, and Brazil because it is spoken in the largest country on the continent.
Only two: China and Taiwan. Mandarin is also an official language of Singapore, but most people speak Singlish as their first language.
China and Singapore would be the only two countries that I know of that have Chinese as an offical language- also people speaking Chinese can be found in most countries.