https://en.m.wikipedia.org/wiki/Flapping
TL;DR, it's not actually "innernational", but rather an alveolar flap on the t that you have a hard time distinguishing between depending on where you grew up.
Re:Ghoti
by jevfdhwdlpp on Sunday June 21, 2020 @01:58AM
(#23590184)
Actually, according to the link you’ve provided, it seems that’s an alveolar “nasal” flap, which sounds different to American ears from the regular alveolar flap. It would sound like “itternational” pronounced by an American if an alveolar flap were to be used.
Actually, the word "international" is a good example -- in my regular American accent it would be pronounced like "innernational", whereas I would distinguish the T when conversing with non-native speakers.