If you could also add how to produce contracted sounds (ya, yu, yo) and the double consonant (tsu), it might be helpful.
Literal
Contracted-sounds (ya yu yo) [and-と] double-consonant (tsu) [possessive-の] producing-method [also-も], adding [if-you-could-いただけると] reference [to-に] become might.
拗音 and 促音 are technical phonetic terms: 拗音 = 'contracted sounds' (the small ゃ ゅ ょ that combine with a preceding kana), 促音 = 'double consonant' (the small っ that gemmates the following consonant). 加えていただけると is the conditional of the humble receiving form — 'if I could receive the favor of your adding.' 参考になるかもしれません is a hedged polite suggestion ('it might become a reference'). The parenthetical explanation of each term with the actual kana is a thoughtful teaching touch.