Even though that might be true the original meaning tells a lot about the culture. Ignoring that leads to cultural appropriation (I hate that phrase). For example "God damn" is a modern slang which is probably not even considered a slang but few centuries ago it was an extremely serious slang with serious repercussions. I don't think that phrase and its meaning can be translated in polytheistic dominated languages like Sanskrit. A cool example is that when as a Hindu I find it completely normal to worship Goddess of death I often find even non religious Christians finding it disgusting.
I think my favorite, though, is Akhilandeshvari. Just thinking about her brings tears to my eyes.
(I know only what little I've read about them. I'm not a practicing Hindu. Maybe I was in a past life :-)
'goodbye' has no religious interpretation. neither does 'jesus christ' as an exclamation - as far as i know both believers and nonbelievers use the term.
even something as recent as 'hi how are you' - you may be given this greeting in london, and the appropriate reponse is not an answer but also 'hi how are you'.