There aren't gismu for all the accepted ground tastes? I'm surprised.
krumami - x1 has an umami taste to observer x2.
titla - x1 is sweet/sugary/saccharine to observer x2.
slari - x1 is sour/tart to observer x2.
kurki - x1 is bitter/acrid/sharply disagreeable to observer/sense x2.
So far so good. But then:
silna - x1 is a portion/quantity of salt from source x2, of composition including x3.
Surely a bare "silna" can't be good to use in this context since it actually refers to the physical salt (which is not clear, are we strictly speaking NaCl here or all salts - ionic compounds?).
Good you added krumami. That is extremely welcomed by me. But, I would considering changing the definition to be more in line with the others. My proposal:
krumami - x1 is umami to observer x2.
(...Ehm. You may ignore the above. I actually thought umami was an adjective as well in English, since that would be logical. Unfortunately, I can't find any proof of it.)
Still. I miss the:
x1 is salty to observer x2
Am I missing something?