Another mockup of the plans for the new fonts, a little closer to the final product:

TOP: Current.
BOTTOM: New (in progress)

A couple things to notice here. The new font is definitely your more modern style of Arabic text, Arial had a very calligraphic appearance. Because that traditional font looked harder to read (IMO, but what do I know about reading Arabic?), I also made it bigger. The new subtitles will be more-or-less the same size for all languages, so some languages (particularly Arabic) will see noticeably smaller subs. English will stay about the same height as before, just a little narrower.

Also look at the color. Pure white subtitles can be blinding when letters are thick enough. If you really look at the subtitles in the top frame, they really seem to glow. In the bottom frame, I took the brightness down a touch. It’s still effectively white, just without that intensity of pure 0xFFFFFF. The new subtitles will actually be a little less bright across the board.