Thai character strings or mixed Thai-English strings starting with Thai character are displayed in Calc cell as right-aligned by default. Thai text in the cell should be left-aligned by default like English or other Western language.
To work around this bug, one need to format all the cells as left-aligned to display the content as it should be, which is quite a burden. This problem does not exist in OpenOffie 3.3.
To investigate this bug, copy and paste either of the following two character strings, paste into a cell, hit Enter key, and see the alignment of the cell content.
ก English texts starting with a single Thai character.
I think this is the same cause as bug 48431, so mark as duplicate.
*** This bug has been marked as a duplicate of bug 48431 ***
It is the same as the last part of the original report of Bug 48431. Confirmed it's a duplicate. Awiting for 3.5.3 to see this bug fixed.