Awww, its cute when couples fumble their words :3
What a pleasant organization they must work for. And ah, love sure is blossoming! I hope no tension surfaces in their relationship.
It’s curiously amusing to see G-man, with all his 1950’s America associations, say words like favourite and colour
Oh it’s a very pleasant organization, I assure you. 
And yeah you bring up a dilemma I had when deciding how to write this; but I thought it is not much of an issue as the words sound the same, despite the difference in the spelling. And I didn’t really want to swap between the different variations of the words for different characters; thought it was a bit redundant as it’s spoken the same.
However that being said for words that have a clear difference in how they are said I will use the American way… but I dunno if anyone will have to say aluminum. XD