1. The Spanish alphabet (the set of symbols) coincides with the English one with the exception of ñ/Ñ
2. In Spanish, the only symbol (letter) that is silent is "h".
3. No Spanish vowels sound identical to their English counterparts. Thus, for example, the "a," in "calcium," or the "e" in "rescue" don't sound identical to the "a" in "calcio." or the "e" in "rescatar."
4. In Spanish, each symbol of the alphabet corresponds to one and only one sound, with the exception of C, G, and the digraphs: QU, CH, LL, GU, and RR.
5. In Spanish, knowing how to spell words is not so important as in English, communication wise, because in general every symbol corresponds to one and only one sound.
9. In Spanish, once you know the sound of each letter, you can read and write, no matter if you know what you are saying.
10. Spanish language has dialects, like Mexican Spanish or Argentinian Spanish.
12. The Spanish word pingüino (penguin) has 8 independent sounds in it
14. Some Spanish words have two spellings. This is the case of the words Mexico/Méjico, océano/oceano or obscuro/oscuro.
15. The reason why there are so many words similar between Spanish and English is because both languages come from Latin.
16. Strictly speaking, no words sound identical in English and Spanish and the reason of this is that all words have at least one vowel (a,e,i,o,u), and none of them sound the same in both languages.
17. The Spanish accent mark has two uses: one, to tell the reader where the enphasis of the word is, and two, to distinguish two words with the same spelling, for example, él (he) and el (the).
18. Not all Spanish words have an accent mark, but if a word has the mark, then the mark goes over a vowel letter (a, e, i, o, u) and this vowel is the one that has the stress.
19. In general, Spanish assigns the same sound to the pairs: B and V, LL and Y, and G (ge, gi), and S, Z, and C (ce, ci).
20. In Spanish, verbs are conjugated, which means that the pronoun (I, you, s/he, etc.) goes after the verb as a suffix, and so does the tense marker, like in Cancel-are--mos (cancel-will-we) = We will cancel