[I'm afraid I couldn't create a ticket as feature request, so I create it as a bug-]
One of the most useful features that Evolution has is that you can select multiple spell-checking dictionaries, so that all messages will be checked against these dictionaries.
Since the feature itself leaves up to the user how many dictionaries are selected, this is useful in the two following scenarios:
-User composes documents in different languages (English, German and Spanish [which is the case for me]).
-Document has portions in other languages than the main language.
There might be cases of well written words that are actually typos, but this something that the user will realize when enabling more than a spelling dictionary.
Just in case it helps, I attach an image of Evolution spell-checking preferences.
Many thanks for your help,