regional.py.luego-usage
Luego: emphasis, not 'later'
In Paraguay luego often means 'indeed / already', calqued from Guaraní voi, not 'later': ya vino luego = 'he did come'. A classic source of confusion.
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Explanation
In Paraguay, luego frequently loses its 'later' meaning and becomes an emphatic tag meaning 'indeed / of course / already', calqued from the Guaraní particle voi: ya vino luego ('he did come / he already came'), eso luego ('that's exactly it').
Context separates the temporal luego from the emphatic one; the emphatic sits after the verb or at clause end and adds insistence rather than time. Recognizing it prevents misreading a sentence as being about the future.
The emphatic luego clusters with other markers — ya … luego, and the Guaraní clitic -ko — to stack insistence (ya sabía luego, 'I knew it all along'). Because the usage is so specific to Paraguay, it regularly trips up Argentines and other neighbors, who read it as the temporal 'later'; there is no substituting después for it.
Examples
I already finished (indeed).
Region: PY
That's exactly what I told you.
Region: PY
I knew it all along (of course).
Region: PY