Soulver needs to know which format to use to identify valid numbers
Different regions use different formats for numbers. For instance, in the United States, a comma is used as a thousand separator (1,000) and a period as a decimal point (1.5), while in Germany it is the other way around (1.000 and 1,5).
By default, Soulver uses the settings in your Mac's Language & Region preference pane.
The Language & Region system preference pane.
You can also select different settings in Soulver's dedicated region settings.
Choose your preferred region in the Region settings
Sheets will be converted into the new region when you open them