IP from Bulgaria showing as from USA

Now I start to use Piwik and I going in my site. I am from Bulgaria my IP is, but Piwik show that this IP from USA.

The default GEOlocate in Piwik is to guess, according to the preferred language of the browser. If your browser is configured to specify US English as the preferred language while accessing web sites, Piwik will guess “USA”. If you’re set for Hungarian, Piwik would guess “Hungary”, Finnish – “Finland”, etc.

You need to install a Maxmind GEOlocate database on your server or in the “misc” directory, and then configure Piwik’s GEOlocate feature accordingly.

For small sites or sites with low traffic volumes, the PHP method, where the database is installed in the “misc” directory, is easiest to set up.