It is and search engines do treat them separately, which is problematic, as seeing the same content on multiple domains may be seen as spammy and lead to downranking.
Kagi recently added a fediverse filter, though I barely use it because there are rarely good results. Just isn't much content worth searching on lemmy yet
I don't know OP's specific background but english is taught in most of the subcontinent and is the primary language for business and formal matters, so I wouldn't expect any issues with it
Using email for anything is a non-feature for me. I want nothing to do with that outdated, confusing piece of tech that has been shoved in all sorts of places it doesn't belong
Sounds more like a font that makes the characters ambiguous.
lol vs |o| looks very different on my device