There is still a bug. I really hope this is fixed. It would be very helpful.
Currently there are still issues in 1.21.100
Bedrock Edition has already been fixed. in MCPE-166005
Correct Example for Thai Vowel Positioning
คร่ำครวญ
ย้ำเตือน
ร่ำรวย
ร่ำร้อง
ช้ำใจ
น้ำใจ
น้ำชา
น้ำหนัก
Some Thai vowels and tone marks (e.g., Sara Am - ำ, or double stacked marks) still render incorrectly in Minecraft. They overlap or shift to wrong positions, making text hard to read.
Steps to reproduce: Write Thai words like น้ำ, อ้ำอึ้ง, ช้ำ, คร่ำ Observe the rendering.
Expected: Proper Unicode rendering for Thai vowels and stacked marks.
Actual: Misaligned or overlapping glyphs.
You can try this by using the Thai language resource pack.
(THLanguage Bedrock) https://github.com/MineGarp/THLanguage_Bedrock
Please fix this bug.