Hello,
We may need some detail information
to identify the exact problems.
1. Installed dictionaries does not appear in in the instant
spell check dictionary selection.
I guess you refer to the Primary Dictionary
list in spell check preference pane. So which language dictionary
you installed? Where did you get the dictionary package? And
how to install?
2. Language tagging is no longer available in the tools
list.
I think you mean that can't enable "Language"
in toolbar list, right? If so, please open menu View->Toolbar,
the menu item "Show Toolbars Only When Editing" is checked or
not, if checked, uncheck it.