Shortcut keys with - Ctrl+Space - Shift+Space - Ctrl+Shift would not work under zh_TW locale (and probably most CJK locale) because they are related to our input method which - IM is launched by ctrl-space - half/full type is switched by shift-space - input method selecting is going through by ctrl-shift For example, in Calc the Ctrl-Space to select column and Shift-Space to select row can't work because the key combinations would be hijacked by our input method. Ctrl+Shift+Space to add non-breaking space can't work in Writer because it will be implemented to switch from half-type to full-type characters.
We have bug 115052 about the fact that LibreOffice is ignorant about different languages. The ticket is about German umlauts that do not work and keys that are hard to reach on a non-english keyboard. I suggest to close this ticket as a duplicate. PS: needsUX needs CC to ux-advice
*** This bug has been marked as a duplicate of bug 115052 ***