The word spirit here in Greek is which also means breath. He is taking about language so in context he is using it to mean breath.
This is the direct relationship to the context of the passage where he talking about speaking and language.
I believe it was you who said understand in Context so you do not get conned. ( I know you said it better)
When he is talking about spiritual it is translated as spiritual
pneuma: wind, spirit
Original Word: πνεῦμα, ατος, τό
Part of Speech: Noun, Neuter
Transliteration: pneuma
Phonetic Spelling: (pnyoo'-mah)
Short Definition: wind, breath, spirit
Definition: wind, breath, spirit.