Most online casinos have multiple languages to choose from. This is of course to make sure that the customers enjoying their casino gambling experience get the very best service to their preferences. Supporting local languages and preferred languages shows the casinos dedication to customer experience and service. Here you can list all casinos based on whatever language you prefer.
French is one of the most spread languages through colonization mainly to the west (Canada) and south (Africa). There are about 76 million native french speakers. Adding to that there are 70-100 million people that speak it as a second language. There are also a wide range of higher estimations on several hundreds of millions more, no verified statistics behind those latter numbers.
Chinese by many academics is described not as one language but a group of languages. Today chinese is usually described as traditional and simplified chinese. As a spoken language many people think about mandarin and cantonese as the two main different dialects. Mandarin is by far with an estimated 1 billion people speaking it as their first language the biggest one. In total an estimated 1.2 billion speak chinese as their first language.
English is the worlds most spoken and spread language. The name english comes originally from a west germanic tribe called Anglia. They were one of many tribes that moved to england during the post roman period. The modern english as we know it today developed mainly during the 15th century. In the 17th century the english language spread through out the world during the colonization up until the 20th century when colonization stopped and conquered countries gained back their independence.
The official language of Vietnam is vietnamese where it also has its origin. As a fun note vietnamese have been recognised as a minority language in Czech Republic. Vietnamese belongs to the Mon-Khmer language family more known today as the Austroasiatic language family. It has been influenced by chinese and at one point used chinese characters before switching to the latin alphabet with a twist.