How to distinguish an inn from an inn? Are there any differences and meanings between them?

Inns should be the plural of inn. The different English translations you see are translated by the hotel itself, and there is no authoritative basis.

A hotel, inn, pub, esp in a country or by a highway.

Stay in a hotel

rely on

vacationland

health resort

Rest resort

Porters, mountain cottages (where hunters live), hotels (in tourist areas) and meeting places (for local communities)

Temporary accommodation, boarding (at sb's place) )