Every time I create a new workspace in Eclipse I have to turn off the spell checking via Preferences. (Preferences->General->Editors->Text Editors->Spelling->Enable Spell Checki
If you are writing Java code, Window -> Preferences -> Java -> JDT Spelling
It's not a perfect fix, but you can copy existing workspace preferences into any workspace. I keep a separate .epf
(Eclipse preferences file, I guess) that I just import into every new workspace I create:
File → Import... → General → Preferences → Next > From preference file
Preferences->General->Editors->Text Editors->Spelling Uncheck the box "Enable spell checking"
There are some ways for sharing preferences, but it doesn't come with the platform. The one I use is now available as an attachment to https://bugs.eclipse.org/bugs/show_bug.cgi?id=334016 or more particular as attachment https://bugs.eclipse.org/bugs/attachment.cgi?id=196866
Install into your Eclipse. Then you can export selected preferences to an .epf file. Also add a preference (!) in Preferences > General > Common Preferences which will share your settings across newly created workspaces.
I use this all the time and though it is not perfect, it does save a lot of effort in keeping my preferences aligned across workspaces.