You specify fixed font sizes for the JIRA fields. I'll check and see if this is in the CSS. If that is the case, I'll be able to fix it (I'm pretty sure I'll be able to address it).
I got complaints from a Chinese and a Japanese user that they can't enlarge the font enough to be able to decipher Kanji/Chinese script.
We need to allow them to enlarge the font enough to be able to view the script.
As I said, I'll probably be able to address this in CSS, but you might want to look at what you are distributing.
This is immediately visible in the "Edit Preferences" page. When my engineer enlarged the font, the outer areas and the admin menu enlarged, but the part in the work area did not enlarge. In addition, bold text is the enemy of Kanji.