It is known as Ciudad de Mexico, or Distrito Federal (from Federal District, which is the political entity that cointains Mexico City; it is just like DC in the United States).
To pronounce Tristan as it is in Spanish, try TREE-stahn. (Note: r is rolled in Spanish.)
esta -if you are in Mexico (and i think anywhere), The e would be pronounced "eh", the s as in snake, the t as in turn, and the a as an open-mouthed,longer a, as in "ah" Many words in spanish use these sounds, i have noticed it to be similar to japanese sounds. NB: If the word is written as above, pronounce it 'Esta' = 'this (feminine object)' If there is an accent on the 'a', pronounce it 'estAH' = 'he/she/it is', or 'you are'
In Mexico the Spanish word for Spanish is Español.
You pronounce it 'PEE ahs.'
Timothy is Timoteo in Spanish.
you pronounce it a(DeLE) in Spanish
MEH.
The main festival in Mexico would be the 5th of May, "Cinco de mayo", and in Spain they pronounce it 'THEENGcaw they MAHyaw' ('TH' as in 'thin'; 'th' as in 'they'), in Latin America 'SEENGcaw etc.'
The pronounce it would be:E - ge - ra(get)
"K" is pronounced "ku" in Spanish.
[sh-k'aret]