Multiple Languages

You can use WPML or Polylang plugins


1: Translate Appearance >> Customize in WPML:
Go to WPML >> String translation >> Translate texts in admin screens
Find theme_mods_ireca or theme_mods_ireca-child
Choose option want to translate
Choose Apply Button: If save data is error, you have to increase input vars.
You can insert this code to .httacess in root site: php_value max_input_vars 10000
Go to WPML >> String Translation
2: Translate text, value in Custom field checkout: You can make these above steps, however you have to choose Ova CRS plugin