We are using the pipe character as it is readily available in our favourite Latin script fonts. See for example: https://twitter.com/ShriramanaS/status/793480884116529152
It would be ideal for Sanskrit/Indic text in IAST/ISO to be displayable/printable using any common Latin font which is found typographically pleasant. For instance the font I have used in that Twitter post is Gentium Basic. I use this font for most of my Latin script publication purposes (including Unicode documents) and it contains the pipe character but it does not contain Devanagari characters. It would be difficult to canvas Latin font vendors to include the Devanagari characters 0964/0965 on a small technicality of character property. Is there a particular reason it's *really* necessary to include Latn in the script extension property of 0964/0965? -- Shriramana Sharma ஶ்ரீரமணஶர்மா श्रीरमणशर्मा 𑀰𑁆𑀭𑀻𑀭𑀫𑀡𑀰𑀭𑁆𑀫𑀸