[Solved]: Error: Could not symlink file: /usr/local/Cellar/tiger-vnc/1.2.0/share/locale/sv/LC_MESSAGES/tigervnc.mo /usr/local/share/locale/sv/LC_MESSAGES is not writable. You should change its permissions.

Solution:

sudo chown -R $USER:admin /usr/local/share

should set the correct ownership and group for all files and directories below and including /usr/local/share