Comparison of Thai vs Khmer language history gives us differences between origin of Thai and Khmer language. History of Thai language states that this language originated in 1283 CE whereas history of Khmer language states that this language originated in 14. 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 Khmer 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 Khmer greetings helps you to understand basic phrases in Thai and Khmer language. Thai word for "Hello" is สวัสดี (S̄wạs̄dī) or Khmer word for "Thank You" is សូមអរគុណអ្នក (saum arkoun anak). Find more of such common Thai Greetings and Khmer Greetings. These greetings will help you to be more confident when conversing with natives that speak these languages.
The Thai vs Khmer difficulty level basically depends on the number of Thai Alphabets and Khmer 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 Khmer are the origin, speaking countries, language family, different greetings, speaking population of these languages. Want to know in Thai and Khmer, which language is harder to learn? Time required to learn Thai is 44 weeks while to learn Khmer time required is 44 weeks.