Why are my Safari search results in Bulgarian?

Try a different search engine. Same results?

Are you using a VPN? If you are, don't. You will get search results appropriate to the location the VPN provides.

kdsixseven (author)

Perhaps (unknown to others in this Community) you might

be in proximity to another country; could it be Bulgaria(?)

Check your settings and look into time zones, among other

things that can affect regional zone and language use. Not

those may be to blame; but something IS!