The interlanguage speech intelligibility benefit (ISIB) suggests that non-native listeners find non-native speakers most intelligible if they share a native language (L1). But the ISIB does not yet account for accent intelligibility within the same L1. The present EEG study measured real-time speech processing among Puerto Rican Spanish speakers who listened to four geographically distinct Spanish-language accents. Preliminary findings contradict the ISIB, as the Puerto Rican accent did not facilitate comprehension for Puerto Rican listeners.