> conejo (which has the long a sound in the second syllable).
The Spanish word is pronounced more like "koh-neh-hoh" (or [ko'neho] in IPA), no "long a" ([ei] in IPA) there. The English "long vowels" (diphthongs really: a combination of two vowel sounds) would be written with two letters in Spanish (and IPA).
Good clarification. Depending on the variant of English, "long e", "long u" and "long a" may or may not sound like diphthongs. They can be analysed as /ij/ and /uw/. Wikipedia puts them under "potential diphthongs".
The Spanish word is pronounced more like "koh-neh-hoh" (or [ko'neho] in IPA), no "long a" ([ei] in IPA) there. The English "long vowels" (diphthongs really: a combination of two vowel sounds) would be written with two letters in Spanish (and IPA).