  We present the first shared task for detecting and analyzing code-switching
in Guarani and Spanish, GUA-SPA at IberLEF 2023. The challenge consisted of
three tasks: identifying the language of a token, NER, and a novel task of
classifying the way a Spanish span is used in the code-switched context. We
annotated a corpus of 1500 texts extracted from news articles and tweets,
around 25 thousand tokens, with the information for the tasks. Three teams took
part in the evaluation phase, obtaining in general good results for Task 1, and
more mixed results for Tasks 2 and 3.
