1. A computer-implemented method for creating a speech recognition model, the method performed by a processor and comprising the steps of: generating, by the processor, a standard model of a triphone standard common language based on training data of the standard common language; generating a first model of a monophone dialectal-accented common language based on development data of a first accent of the standard common language; creating a temporary language model by merging, through an iterative process, the standard model and the first model with reference to a first confusion matrix formed between the standard model and the development data of the first accent; generating a second model of a monophone dialectal-accented common language based on development data of a second accent of the standard common language that is different from the first accent; and creating the speech recognition model by merging, through an iterative process, the second model and the temporary language model with reference to a second confusion matrix formed between the temporary model and the development data of the second accent.