The writer assisting features are frustrating for me in Calc, since I often need inputs exactly as I type them without changes. I disabled spell checking, but Collabora is still enforcing grammar corrections such as capitalizing the first letter after a period. I also found a Language setting in the Spelling menu and set it to “None”, which also seemed to do nothing. Online documentation suggests there should be a “Tools > AutoInput” or “Tools > Autocorrect” menu, but neither of those exist in my version, and those options don’t appear anywhere I can find. Some help would be appreciated.