Comparison of Thai vs Vietnamese language history gives us differences between origin of Thai and Vietnamese language. History of Thai language states that this language originated in 1283 CE whereas history of Vietnamese language states that this language originated in c. 1440. Family of the language also forms a part of history of that language. More on language families of these languages can be found out on Thai and Vietnamese Language History.
People around the world use different languages to interact with each other. Even if we cannot communicate fluently in any language, it will always be beneficial to know about some of the common greetings or phrases from that language. This is where Thai and Vietnamese greetings helps you to understand basic phrases in Thai and Vietnamese language. Thai word for "Hello" is สวัสดี (S̄wạs̄dī) or Vietnamese word for "Thank You" is Cam on. Find more of such common Thai Greetings and Vietnamese Greetings. These greetings will help you to be more confident when conversing with natives that speak these languages.
The Thai vs Vietnamese difficulty level basically depends on the number of Thai Alphabets and Vietnamese Alphabets. Also the number of vowels and consonants in the language plays an important role in deciding the difficulty level of that language. The important points to be considered when we compare Thai and Vietnamese are the origin, speaking countries, language family, different greetings, speaking population of these languages. Want to know in Thai and Vietnamese, which language is harder to learn? Time required to learn Thai is 44 weeks while to learn Vietnamese time required is 44 weeks.