26/06/2021
Why is it that there are many consonants in Thai with the same sound?
There are many answers to this and we'll try to explain them one by one.
But before that, try to think that somewhere around the world, another non-English speaker is also wondering why C and K have the same sound. Why CAT is spelled CAT and not KAT, or why CAKE is not KAKE. Why PHYSICAL and not FISIKAL. It just so happens that in Thai are bunch more of this Cs and Ks.
The answers are very simple and you don't have to overthink about this question again:
1. 𝗧𝗵𝗮𝗶 𝗹𝗮𝗻𝗴𝘂𝗮𝗴𝗲 𝗶𝘀 𝗻𝗼𝘁 𝗮 𝗽𝗵𝗼𝗻𝗲𝘁𝗶𝗰 𝗹𝗮𝗻𝗴𝘂𝗮𝗴𝗲. Phonetic languages have the same spelling the way they speak it. That is why it is easy for the speakers to spell some words even though it's their first time hearing a word. Meaning, there are no other alternative sounds by altering its spelling. Some examples of phonetic languages are Turkish, Tamil, Korean, Tagalog and more. English is NOT a phonetic language. You can clearly observe by the way sound changes when you alter the spelling.
2. 𝗦𝗼𝗺𝗲 𝗼𝗳 𝘁𝗵𝗲 𝗰𝗵𝗮𝗿𝗮𝗰𝘁𝗲𝗿𝘀, 𝗲𝘃𝗲𝗻 𝘁𝗵𝗼𝘂𝗴𝗵 𝘁𝗵𝗲𝘆 𝘀𝗼𝘂𝗻𝗱 𝘁𝗵𝗲 𝘀𝗮𝗺𝗲, 𝘁𝗵𝗲𝘆 𝗯𝗲𝗹𝗼𝗻𝗴 𝘁𝗼 𝗮 𝗱𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝘁 𝗰𝗹𝗮𝘀𝘀. The consonants ข ฃ ค ฅ and ฆ all produce aspirated [kʰ] sound, however, ฃ and ฃ are high class consonants and ค ฅ and ฆ are low class consonants. ฃ and ฅ are now obsolete, meaning they are no longer commonly used. These obsolete characters are borrowed from Sanskrit and might have evolved from a different sound to the sound that we know today.
High Class: ข --- ฃ
Low Class: ค --- ฅ --- ฆ
3. 𝗧𝗵𝗲𝘆 𝘂𝘀𝗲𝗱 𝘁𝗼 𝗵𝗮𝘃𝗲 𝗮 𝗱𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝘁 𝘀𝗼𝘂𝗻𝗱 𝗹𝗼𝗻𝗴 𝘁𝗶𝗺𝗲 𝗮𝗴𝗼. Due to many borrowed words from Sanskrit, Thais cannot pronounce some of their sounds, that's why they used another character to represent it.
Example: ภ [bʰ] became [pʰ]
ธ [dʰ] became [tʰ]
In Sanskrit ภ has originally aspirated [bʰ] sound, but because Thais cannot pronounce an aspirated B, they used [pʰ] just like พ. The same way for ธ, it's hard for Thais to pronounce an aspirated [dʰ] from Sanskrit so they used the aspirated [tʰ] sound like ท. Remember, Thai and Sanskrit come from two different language families: Tai-Kadai and Indo-European, respectively.