Dave Mattingly shows an easy way to anglicize values:
If your customer’s name is “José” but you search for “Jose”, you won’t (by default) find him.
Here’s a simple way to take care of that in your SQL database, without changing the data that you have.
If a particularly system only needs to support one language (e.g., English), this can be helpful, at least until somebody throws in Chinese or Hebrew characters. That said, supporting Unicode is the best move when available.