I did look it up, it’s great and faster than my layout for the big languages – German, French, Spanish and Italian – because the accented letters are on the third and fourth levels directly and not written via dead keys, but it’s harder to write most of the others like the Slavic languages (š, ů, ď, ł, ć, ̦ż, ą), Romanian (ș, ṭ, ă), Hungarian (ő, ű), Catalan ( · ), Azeri (Ə), Portuguese (ã), Turkish (ş, ţ, ğ, ı. İ) and Maltese (Ħ, Ġ). In EurKey each one requires Shift+AltGr+DeadKey+letter and a few are missing, while in my layout most of these require one less key. Of course this is not useful to most people, but I’m happy with it.