schning on "[Plugin: BMI / IMC Calculator] change Language"

hi, thanks for the plugin.
How i can change the language to english ?
I use a german wordpress and i installed your plugin but default is spanisch ? to integrate i use the shortcode in a post like = [bmi_calculator hide_table=true hide_styles=true system_type="imperial" section_title="My personal title" ] best regards s.

https://wordpress.org/plugins/bmi-imc-calculator/