The meaning of "PSU" in all 3 languages should be the same size. In Windows, this seems to be okay; but in Linux (elementary os), it's not:

Requirements
- Same header font for each language, on every OS (even mobile)
- Same-style fonts: either all sans-serif or serif
(in the above image, the Sinhala & English text is in serif and the Tamil text is in sans-serif)
Suggested solution
It seems to require only a very simple fix. One can use a specific webfont (external or hosted here) specifically for the Sinhala text. Maybe css tags like .sinhala, .tamil that applies this font-style can be helpful for future use.
The meaning of "PSU" in all 3 languages should be the same size. In Windows, this seems to be okay; but in Linux (elementary os), it's not:
Requirements
(in the above image, the Sinhala & English text is in serif and the Tamil text is in sans-serif)
Suggested solution
It seems to require only a very simple fix. One can use a specific webfont (external or hosted here) specifically for the Sinhala text. Maybe css tags like
.sinhala,.tamilthat applies this font-style can be helpful for future use.