LibreOffice Portable has partially missing localization. I'm using Russian locale with LibreOfficePortable_7.0.0_MultilingualStandard portable apps package.
Tested with all applications - Base, Calc, Draw, Impress, Math, Writer. That bug exist for a long time so I decided to report it here.
Here are some Calc screenshots, I marked red wrong (missing localization).
Portable - you can see some non-translated string in File menu, and almost complete non-translated settings.
https://i.postimg.cc/nVRbGxwR/Libre-Office-Portable1.png
https://i.postimg.cc/fRdGs9Wp/Libre-Office-Portable2.png
Native
https://i.postimg.cc/ZKWkfQGT/Libre-Office-Native1.png
https://i.postimg.cc/dtpbgBFG/Libre-Office-Native2.png