The use of formulaic language in written discourse is an important indicator of language competence. Nonetheless, the features of lexical bundles used by lower proficiency English as a Foreign Language learners have received little attention. The present study addressed this gap by employing a corpus-based method to investigate the quantity, function, and quality of four-word lexical bundles produced by low proficiency L2 English writers with 11 different L1 backgrounds in response to a timed English writing assessment. The investigation was specifically anchored on the data extracted from 1,330 essays using Wordsmith 7.0. Results of the investigation showed (1) an over dependence on writing topic related bundles; (2) an Indo-European L1 language background positively influencing lexical bundle production; (3) an overuse of stance expressions and discourse organizers at the expense of referential expression usage; (4) L1 Japanese, Korean, and Telugu writers producing more accurate lexical bundles and L1 German writers producing fewer accurate lexical bundles; and (5) the frequent use of lexical bundles not leading to highly accurate and appropriate use of lexical bundles. The implications of these results were discussed in connection with foreign language education.