Allophone

Allophone is the absolute pronunciation of a phoneme. Switching between two or more allophones normally doesn't change the meaning of a word.

Free Allophone
Free allophone is an accent-dependent allophone. Not only switching between free allophones doesn't change the meaning of a word, it's also unlikely to be considered as a mistake.

Conditioned Allophone
Conditioned allophone is an allophone that in in complementary distribution with one or more allophones, and it is usually phonetically similar to other allophones of the phoneme and has the same spelling.

Allophones in Orish
Basically, Orish avoids enforcing conditioned allophones, but allows free allophones. That's because dealing with conditioned allophones is difficult, while free allophones can provide accessibility in the pronunciation. Here are prominent allophones in Orish:
 * There are many correct ways to pronounce the letter R, and all of them are correct regardless of the position.
 * The letter N, which is normally pronounced as /n/, can optionally be pronounced as /ŋ/ before velar consonants.
 * The letter L can be pronounced either as /l/ (light and plain) or as /ɫ/ (dark and velarized or pharyngealized).
 * The letter X can be pronounced either as /x/ (velar) or as /χ/ (uvular).
 * The letter H can be pronounced either as /h/ (unvoiced) or as /ɦ/ (voiced).
 * The letter I, which is normally pronounced as /i/, can also be pronounced as /ɪ/, especially in closed syllables.
 * The letter U, which is normally pronounced as /u/, can also be pronounced as /ʊ/, especially in closed syllables.
 * The letters S and Z, which are basically alveolar, can also be interdental, that's what people who have lisp commonly do.