The purpose of this study, to determine the most suitable model for motivation in language learning. It aims to ensure the significant relationship between the exogenous variable: writing strategy, study habits, classroom climate, and the endogenous variable in language learning motivation. In addition, non-experimental correlational research design and structural equation models to determine the most appropriate motivational model in motivation language learning. However, a stratified random sampling technique to select 436 participants from ninth-grade students from secondary public schools in Region XI. The following statistic used: mean, Pearson r, regression, and structural equation model (SEM). The exogenous variables have a significant correlation with endogenous variables that the fifth model adapted result of the study. In connection with, exogenous variables acquired a high descriptive level. The writing strategy includes planning, implementation, and revision; study habits include: time management, learning environment, forecasting skills and preparation, note-taking, reading skills, writing skills, and language skills; classroom climate includes: teacher support, student independence, interaction, and collaboration in class; and the endogenous variable acquired a high descriptive level of motivation in language learning that included: instrumental and integrative motivation.