How would you change your language's orthography (i.e. alphabet, spelling rules, etc) if you were given the chance to reform it?
For instance, my native language is Arabic, and I would first:
・Add پ as a letter to represent the foreign sound /v/ [See ڤ for note]
・Establish ج as /g/ (as like in Egyptian Arabic, but in contrast to most other modern dialects which instead pronounce that letter as a j-type sound) [Rationale for this change is that /g/ is the original sound value for the phoneme, and is the sound found in pre-classical Old Arabic, as well as in a a small number of modern dialects (most notably Cairene Egyptian)]
・Add چ as a letter to represent /d͡ʒ/ (i.e. the English "j") [This is the current usage of the letter in Egyptian Arabic.]
・Add ژ as a letter to represent the foreign sound /ʒ/ (i.e. the French J) [Letter and sound value taken from Persian]
・Add ڤ as a letter to represent the foreign sound /p/ [The normal Arabic ف /f/ was in Pre-Arabic a /p/, so I find it better to use a variant of the ف /f/ letter rather than the ب /b/ letter to represent /p/. Hence why I suggested ڤ as /p/, and پ as /v/.]
・Would also make two special diacritics to represent foreign vowels /e/ and /o/
Then of course, I would make writing short vowels mandatory. I would also make all intervocalic glottal stops written with a full ء all the time rather than the current shenanigans.