You can use your flag with the /flag Country command.

Available flags:

• Korea
• Albania
• Algeria
• Arab Emirates
• Argentina
• Australia
• Austria
• Belgium
• Bosnia
• Brazil
• Cameroon
• Canada
• Chile
• China
• Colombia
• Ivory Coast
• Croatia
• Czech
• Denmark
• Egypt
• England
• Finland
• France
• Germany
• Ghana
• Greece
• Honduras
• Hungary
• Indonesia
• Ireland
• Israel
• Italy
• Japan
• Korea Republic
• Kosovo
• Lithuania
• Luxembourg
• Macedonia
• Malaysia
• Mexico
• Netherlands
• New Zealand
• Nigeria
• Norway
• Paraguay
• Peru
• Philippines
• Poland
• Portugal
• Romania
• Russia
• Saudi Arabia
• Serbia
• Singapore
• Slovakia
• Slovenia
• South Africa
• Spain
• Sweden
• Switzerland
• Thailand
• Turkey
• United Kingdom
• Uruguay
• Usa
• Venezuela
• Vietnam
• Armenia
• Azerbaijan
• Bahrain
• Belarus
• Bolivia
• Brunei
• Bulgaria
• Burma
• Cambodia
• Cyprus
• Dominicanrepublic
• Ecuador
• Elsalvador
• Estonia
• Faroeislands
• Georgia
• Guatemala
• Iceland
• India
• Jamaica
• Kuwait
• Laos
• Latvia
• Lebanon
• Moldova
• Monaco
• Montenegro
• Morocco
• Newcaledonia
• Oman
• Parkistan
• Panama
• Puertorico
• Somalia