Nothing you mentioned in your OP was pretentious.
If you don’t like using non native words you are going to struggle to get through the day. Modern day English is full of words taken from other languages.
Just a few examples:
Cartoon is Italian,
Loot is Hindi (as is shampoo),
Butter was originally Greek,
Coffee is Arabic (as is caravan), Boss is from Dutch (as is booze and stove),
Breeze is from Spainish,
Punch (as in the drink) is from Urdu.
Though, there, their, thing are all from Norse.
Perhaps your issue is just with French? Do fiancé, entrepreneur, chef, picnic, omelette, silhouette, depot, genre or souvenir strike you as pretentious too?
About 30% of English words come from French.
The very reason that English is such a successful language is that it takes on words from other languages.