This thesis addresses the speech of the village of Režanci at the phonological and partially morphological linguistic levels. The local speech is observed in the context of the previously studied neighboring speech of Svetvinčenat and the linguistic features of the southwestern Istrian dialect to which it belongs. The linguistic corpus was collected through field research, which included completing a Questionnaire for Research on the Southwestern Istrian Dialect and conversing about daily life in the village with native speakers. The research results showed that the linguistic features of the village of Režanci align with the linguistic features of the southwestern Istrian dialect and the recently described speech of Svetvinčenat, both at the phonological and morphological levels. The presence of the ikavian reflex of jat in lexical and grammatical morphemes with constant ekavisms was confirmed, along with a five-vowel system, a newer three-vowel system, and reflexes of the front nasal in a and e. The reflex of the back nasal, as well as the vowel l > u, was confirmed. The reflex of the semi-vowel in a, the transition from ra to re in examples such as kresti and resti, and the change from final -l to -a were also noted. The consonant inventory is typical of southwestern Istrian dialects, with the so-called middle  without đ. The sound lj is pronounced as a blended sound. The sound đ is replaced by ž or j. The sound h is preserved in all positions. The transition of final m to n and the standardization of the prepositions iz and s to z were confirmed. Results include the jotation of consonant clusters *sk and *st, as well as *zd and *zg > št, žd, while the consonant cluster zdj has undergone metathesis to jz. In examples like pojti and dojti, the cluster jt is preserved in the infinitive, and jd is preserved, as well as the cluster čr-. Rotacism is present in the verb 'moći' > moren. The existence of prosthetic j and prosthetic v was confirmed. There is also a simplification of consonant clusters, such as pt > t, pš > š, tvr > tr, dn > n, and dr. Sibilization has been abolished. At the morphological level, archaism in the declension of nouns was confirmed. Two-syllable masculine nouns have a short plural form. The vocative case is rare. The nominative of masculine demonstrative pronouns has the suffix -i, and the genitive and accusative forms of the personal pronoun oni have the form he, as well as the contracted form of the pronoun koji. The present tense of the verb 'ići' has a base on gre(d)-, and infinitives regularly end in final -i. Based on these linguistic features, we can conclude that the speech of the village of Režanci has the same linguistic features as the neighboring Svetvinčenat. For a broader picture of Svetvinčenat's speech, it would be useful to investigate more neighboring speeches.