Hootsuite lets you “geo-target” your Tweets by country, which is useful for:
A) auto-localizing your tweeted content to the dominant language in that region
B) filtering all tweets coming out of a specified country by keyword
C) avoiding overwhelming audiences in non-target countries with irrelevant content
D) searching geographical regions for mentions of your brand
https://www.youtube.com/watch?v=5eGf8QMHt30