The President of the government of the Basque Country is referred to as Lehendakari (literally, "the first one") in Basque, or Eusko Jaurlaritzako Lehendakari ("President of the Basque Government"). The Spanish title is Presidente del Gobierno Vasco. In Navarrelehendakari is only used when one is speaking in Basque because in Spanish the president of Navarre is presidente and not lehendakari.
"Lehendakari"
Before the establishment of Standard Basque in the 1970s, it was spelled Euzko Jaurlaritzaren Lendakari. Both euzko and lendakari are Basque neologisms created by members of the Basque Nationalist Party.
The generic Basque words for "president" and "government" are presidente/president and gobernu, words originally imported from Spanish. In the Basque language, they are used for other presidents, like the President of France or the president of a football team, and the neologism lehendakari is reserved for the Basque president only.