Translation:The language of Great Britain is English.
Inaccurate. The languages of Great Britain include English, Welsh, Scots, Scottish Gaelic and Irish Gaelic.
Technically, Great Britain doesn't include Northern Ireland as it refers to the island. Though "Britain" is used to refer to full country is the United Kingdom of Great Britain and Northern Island and (I think) the Channel Islands. So no Irish Gaelic I don't think.