The term 'Language That Gave Us 'SLOGAN'' is referring to GAELIC, a language originating from Ireland. GAELIC is an Indo-European language and is the native language of the Irish people. It is also spoken in Scotland, the Isle of Man, and parts of Canada. GAELIC has been around since the 5th century and has had a significant influence on the English language. The term 'SLOGAN' is derived from the GAELIC word 'sluagh-ghairm', which means 'army cry'.