the inner columns are not great and you do need to get Z out of the same column as A to free up that SFB. Interestingly, Spanish might be easier to optimize as

the inner columns are not great and you do need to get Z out of the same column as A to free up that SFB. Interestingly, Spanish might be easier to optimize as a solitary language if the punctuation keys are moved away from the vowel cluster. You can get insanely-low SFB scores. Spanish is a higher-syllable density language with better spelling conventions than English. What some of the alt-Spanish layouts have done is just take an EN-optimized layout and add diacritics (and Canaria is not an exception here either, it just restored some ergo sanity to Spanish vs. pushing Q and J to bad spots like most EN ergo layouts do). For those who work entirely in Spanish most of the time, EN-ergo layouts are not ideal.