Penelitian ini membahas pengembangan sistem penerjemah multibahasa daerah berbasis web yang mengintegrasikan metode Rule-Based Machine Translation (RBMT) dan GPT untuk menerjemahkan Bahasa Indonesia dengan Bahasa Ternate, Makian Dalam, dan Galela menggunakan 5.572 kosakata berbasis kamus digital, dimana RBMT digunakan untuk pencocokan kata berdasarkan aturan dan GPT digunakan untuk memperbaiki struktur kalimat agar lebih natural sesuai konteks, dengan sistem yang dikembangkan menggunakan HTML, CSS, JavaScript, serta integrasi API GPT melalui Vercel, kemudian diuji menggunakan 468 kalimat yang menghasilkan kategori hasil berupa terjemahan sesuai target, berbeda bentuk namun bermakna sama, tidak sesuai akibat keterbatasan kosakata, serta ketidaktepatan karena ambiguitas makna (satu kata yang memiliki banyak arti), sehingga hasil penelitian menunjukkan bahwa kombinasi RBMT dan GPT mampu meningkatkan kualitas terjemahan meskipun masih dipengaruhi oleh ambiguitas kata, kelengkapan kamus, serta penggunaan tanda baca dan pemisahan kata yang dapat mempengaruhi makna dan akurasi hasil terjemahan. This research discusses the development of a web-based regional multilingual translation system that integrates the Rule-Based Machine Translation (RBMT) method and GPT to translate Indonesian into Ternate, Makian Dalam, and Galela languages using 5,572 vocabulary entries based on a digital dictionary, where RBMT is used for rule-based word matching and GPT is used to improve sentence structure to make the translations more natural and contextually appropriate. The system was developed using HTML, CSS, JavaScript, and GPT API integration through Vercel, and was tested using 468 sentences that produced several categories of results, including translations that matched the target exactly, translations with different sentence forms but the same meaning, inaccurate translations due to limited vocabulary, and inaccuracies caused by semantic ambiguity (a single word having multiple meanings). The results of the study indicate that the combination of RBMT and GPT is capable of improving translation quality, although it is still influenced by word ambiguity, dictionary completeness, and the use of punctuation and word separation, which can affect the meaning and accuracy of the translation results.