I used ‘irei’ and ‘iremos’ in a conversation with someone the other day (referring to “I am going tomorrow” and “We will go tomorrow”) and it became clear to me that they were perplexed. Confident it wasn’t my pronunciation I have since been told that the future tense of ‘ir’ is mainly for writing purposes and people tend to use the present indicative of ‘ir’ in general conversation, such as “Vou / Vamos amanhã” - I / We go tomorrow.
I’d be interested to know if this is the case? Or perhaps it’s just here in the north where this is more prominent??