Interesting. I’d never heard of Optimot. Thanks for bringing it to my attention.
The CC BY‑NC‑SA license under which the layout is made available is very unfortunate.
This license prohibits commercial use, so selling a keyboard with the layout printed on it would be prohibited (without special consent from the original author). It also means commercial operating systems can’t include the layout.
This is notably in contrast to the likes of Colemak, which is released as public domain. And Bépo, which has a more liberal CC license. (Bépo also got published as a national standard, implementations of which are not subject to any licensing restrictions. It was this national standard version which got included in Windows, not the CC-licensed Bépo.fr version.)
Should the € symbol remain the only Alt-Gr symbol shown on the international US English keyboard? Not all its Alt-Gr characters are Europe oriented. (2560×1600, 180°, ½ cup, 8ft², Ch2 §3 ¶2, etc).
Historically, € required Unicode support (unlike many other Alt-Gr keys in Latin-1). Around the turn of the century, highlighting € was a way to advertise new Unicode support on computers, but that is not a reason to make € special now.
We are working at a Pan-EU-NGO and have struggled with all those keyboard layouts out there. Usually we pick the Swiss layout, since it has French and German umlauts-layout combined. Unfortunately Spanish Punctuation and Slavic (and Nordic) letters are missing. So there is one that we would really like to have: it’s called EurKEY (by Steffen Bruentjen)
Interesting. Perhaps some countries just use symbols more often, instead of text on their keyboards, or vice versa. With so many countries and presumably so many different people with a say in what layouts will be used, inconsistency probably should be expected. It only matters what is normal for a particular region.
Error on US English (RGB). It has text for right shift.