I. INTRODUCTION

II. OVERVIEW OF MULTILINGUAL LARGE LANGUAGE MODELS
A. Evolution of MLLMs
B. Key Techniques of MLLMs
C. Multilingual Capacities of MLLMs

III. MULTILINGUAL CORPORA AND DATASETS
A. Multilingual Corpora in MLLMs

IV. MULTILINGUAL REPRESENTATION ALIGNMENT
A. Static multilingual representation
B. Contextual multilingual representation
C. Combined multilingual language representation
D. Factors That Affect Alignments

V. BIAS ON MULTILINGUAL LANGUAGE MODELS
B. Bias Benchmark
C. Debias Technique

VI. FUTURE DIRECTIONS