User case:
1- Install dictionaries for Spanish and Italian.
2- Set the language for two different paragraphs: one in Italian, the other in
Spanish.
3- In the Italian paragraph, type the word "raccomandare"
4- In the Spanish paragraph start typing the word "racimo"
Result:
When you type “rac†in the Spanish paragraph, autocorrect suggest "raccomandare"
which is wrong because you are typing in the Spanish paragraph, not in the
Italian paragraph.

This is a problem for translators when the languages are akin. The problem is
also present if you have two documents opened at the same time, one in each
language.

PD: I tag this as "enhancement" but in certain cases could be considered as a
"defect" because it gives a confuse input to the user.