Things change and also change with location and social interaction.

I say 'pass' rhyming with 'lass' now rather than 'pass' rhyming with 'arse' both in speech and if/when I sing. So my origins have been modified.

I think it is almost unavoidable. A friend would start speaking like whoever he was with which would occasionally get him into trouble as people thought he was taking the piss (he wasn't - it's just what he did).

If the dominant music is American then it is little surprise that it affects people - even at open mic or singaround level - and strongly influences them. Whether consciously or not.

My dad flew a Hurricane among other planes in the war (quite partial to Mustangs too). The Spitfire had a better PR team